# CAT 2021 LRDI Slot 1 | Previous Year Questions

**Answer the next 4 questions based on the information given **

Ganga, Kaveri, and Narmada are three women who buy four raw materials (Mango, Apple, Banana and Milk) and sell five finished products (Mango smoothie, Apple smoothie, Banana smoothie, Mixed fruit smoothie and Fruit salad). Table-1 gives information about the raw materials required to produce the five finished products. One unit of a finished product requires one unit of each of the raw materials mentioned in the second column of the table.

**Table - 1**

One unit of milk, mango, apple, and banana cost ₹5, ₹3, ₹2, and ₹1 respectively. Each unit of a finished product is sold for a profit equal to two times the number of raw materials used to make that product. For example, apple smoothie is made with two raw materials (apple and milk) and will be sold for a profit of ₹4 per unit. Leftover raw materials are sold during the last business hour of the day for a loss of ₹1 per unit. The amount, in rupees, received from sales (revenue) for each woman in each of the four business hours of the day is given in Table-2.

**Table - 2**

The following additional facts are known.

- No one except possibly Ganga sold any Mango smoothie.
- Each woman sold either zero or one unit of any single finished product in any hour.
- Each woman had exactly one unit each of two different raw materials as leftovers.
- No one had any banana leftover.

**1. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

What BEST can be concluded about the number of units of fruit salad sold in the first hour?

- A.
Either 0 or 2

- B.
Exactly 2

- C.
Exactly 1

- D.
Either 1 or 2

Answer: Option D

**Explanation** :

One unit of milk, mango, apple, and banana cost ₹5, ₹3, ₹2, and ₹1 respectively

We can make the following table for Cost price, Profit and Selling price of each of the products.

Now, we can make the following table for types of products sold be each of the three based on selling price

**Note**: No one except Ganga sells Mango Smoothie.

After the last hour each woman had exactly one unit each of two different raw materials as leftovers but no one had any banana.

Also, leftover raw materials are sold during the last business hour of the day for a loss of ₹1 per unit

∴ Items left could be

(Milk + Mango) ⇒ CP = 8 ⇒ sold at Rs. 6

(Milk + Apple) ⇒ CP = 7 ⇒ sold at Rs. 5

(Apple + Mango) ⇒ CP = 5 ⇒ sold at Rs. 3

**Ganga **sells items worth Rs. 30 in last hour, out of these

**Case 1**: Rs. 6 could be earned from left-overs hence Rs. 24 would be earned from finished products. This is possible by selling Mango Smoothie and Fruit Salad.

**Case 2**: Rs. 5 could be earned from left-overs hence Rs. 25 would be earned from finished products. This is not possible.

**Case 3**: Rs. 3 could be earned from left-overs hence Rs. 27 would be earned from finished products. This is not possible.

Hence, Ganga sells Mango Smoothie and Fruit Salad in the last hour and the left-over items are one unit of Milk and Mango each .

Kaveri sells items worth Rs. 27 in last hour, out of these

**Case 1**: Rs. 6 could be earned from left-overs hence Rs. 21 would be earned from finished products. This is possible by selling Apple Smoothie and Banana Smoothie.

**Case 2**: Rs. 5 could be earned from left-overs hence Rs. 22 would be earned from finished products. This is possible by selling Banana Smoothie and Fruit Salad.

**Case 3**: Rs. 3 could be earned from left-overs hence Rs. 24 would be earned from finished products. This is not possible.

Hence, we have 2 cases for Kaveri.

Narmada sells items worth Rs. 22 in last hour, out of these

**Case 1**: Rs. 6 could be earned from left-overs hence Rs. 16 would be earned from finished products. This is not possible.

**Case 2**: Rs. 5 could be earned from left-overs hence Rs. 17 would be earned from finished products. This is not possible.

**Case 3**: Rs. 3 could be earned from left-overs hence Rs. 19 would be earned from finished products. This is possible by selling Mixed Fruit Smoothie.

Hence, Narmada sells Mixed Fruit Smoothie in the last hour and if left with one unit of Apple and Mango each.

Hence, we have the following final table

Narmada sells one unit of Fruit Salad while Ganga may or may not sell one unit of Fruit Salad.

∴ Number of Fruit Salads sold in first hour can be either 1 unit or 2 units.

Hence, option (d).

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**2. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

Which of the following is NECESSARILY true?

- A.
Kaveri sold one unit of leftover mangoes.

- B.
Ganga did not sell any leftover apples.

- C.
Narmada sold one unit of leftover milk.

- D.
Ganga did not sell any leftover mangoes.

Answer: Option B

**Explanation** :

Consider the solution to first question of this set.

Hence, option (b).

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**3. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

What BEST can be concluded about the total number of units of milk the three women had in the beginning?

- A.
Either 18 or 19 or 20 units.

- B.
Either 19 or 20 units.

- C.
Either 17 or 18 or 19 units.

- D.
Either 18 or 19 units.

Answer: Option A

**Explanation** :

Consider the solution to first question of this set.

Number of units of milk with

**Ganga **= 1/2 (Hour 1) + 2 (Hour 2) + 2 (Hour 3) + 1 (Hour 3) + 1 (Left-over) = 7/8 units

**Kaveri **= 1 (Hour 1) + 1 (Hour 2) + 2 (Hour 3) + 1/2 (Hour 3) + 1 (Left-over) = 6/7 units

**Narmada **= 1 (Hour 1) + 2 (Hour 2) + 1 (Hour 3) + 1 (Hour 3) + 0 (Left-over) = 5 units

∴ Number of units of milk initially could be 18 or 19 or 20.

Hence, option (a).

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**4. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

If it is known that three leftover units of mangoes were sold during the last business hour of the day, how many apple smoothies were sold during the day?

Answer: 6

**Explanation** :

Consider the solution to first question of this set.

Since, 3 units of leftover mangoes were sold at the end of the day, hence Kaveri sold leftover mango that means she sold Apple Smoothie in the 4th hour.

We can make the following table with the additional information.

Number of apple smoothies sold by

Ganga = 2, Kaveri = 1 and Narmada = 2

⇒ Total Apple Smoothies sold = 2 + 2 + 2 = 6

Hence, 6.

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**Answer the next 4 questions based on the information given **

The horizontal bars in the above diagram represent 2020 aggregate sales (in ₹ million) of a company for the different subcategories of its products. The top four product subcategories (Bookcases, Chairs, Furnishings, Tables) belong to furniture product category; the bottom four product subcategories (Accessories, Copiers, Machines, Phones) belong to the technology product category while all other product subcategories belong to the office supply product category. For each of the product subcategories, there is a vertical line indicating the sales of the corresponding subcategory in 2019.

**5. CAT 2021 LRDI Slot 1 | DI - Tables & Graphs**

The total sales (in ₹ million) in 2019 from products in office supplies category is closest to

- A.
16.5

- B.
12.5

- C.
13.5

- D.
18

Answer: Option C

**Explanation** :

**Office Supplies in 2019**:

3.6 (Binders) + 0.4(Art) + 1.9 (Appliances) + 0.4 (Envelopes) + 0.1 (Fasteners) + 0.2 (Labels) + 1.5 (Paper) + 4.3 (Storage) + 1.1 (Supplies) = 13.5

Hence, option (c).

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**6. CAT 2021 LRDI Slot 1 | DI - Tables & Graphs**

The percentage increase in sales in Furniture category from 2019 to 2020 is closest to

- A.
20%

- B.
1%

- C.
8%

- D.
25%

Answer: Option C

**Explanation** :

Furniture sales in 2019:

1.9 + 6.1 + 2 + 4.4 = 14

Furniture sales in 2020:

2.2 + 6.5 + 2 + 4.5 = 15.2

∴ % change = (15.2 - 14)/14 × 100% ≈ 8.6%

Hence, option (c).

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**7. CAT 2021 LRDI Slot 1 | DI - Tables & Graphs**

How many subcategories had sales of ₹ 4 million or more in 2019 and registered an increase in sales in excess of 25% in 2020?

Answer: 1

**Explanation** :

Only Phones registered an increase of more than 25% from 2019 to 2020 and also had sales of more than $4 million in 2019.

Hence, 1.

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**8. CAT 2021 LRDI Slot 1 | DI - Tables & Graphs**

The improvement index for a category is the maximum percentage increase in sales from 2019 to 2020 among any of its subcategories. The correct order of categories in increasing order of this improvement index is

- A.
furniture, technology, office supply

- B.
technology, furniture, office supply

- C.
office supply, technology, furniture

- D.
office supply, furniture, technology

Answer: Option A

**Explanation** :

In furniture category, Chairs subcategory has the highest % increase i.e., approx. 15%.

∴ Improvement index for furniture is 15%.

In office supply category, Appliances subcategory has the highest % increase i.e., approx. 60%.

∴ Improvement index for office supply is 60%.

In technology category, Accessories subcategory has the highest % increase i.e., approx. 40%.

∴ Improvement index for technology is 40%.

∴ Improvement index of Furniture < Technology < Office Supplies.

Hence, option (a).

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**Answer the next 6 questions based on the information given **

A journal plans to publish 18 research papers, written by eight authors (A, B, C, D, E, F, G, and H) in four issues of the journal scheduled in January, April, July and October. Each of the research papers was written by exactly one of the eight authors. Five papers were scheduled in each of the first two issues, while four were scheduled in each of the last two issues. Every author wrote at least one paper and at most three papers. The total number of papers written by A, D, G and H was double the total number of papers written by the other four authors. Four of the authors were from India and two each were from Japan and China. Each author belonged to exactly one of the three areas — Manufacturing, Automation and Logistics. Four of the authors were from the Logistics area and two were from the Automation area. As per the journal policy, none of the authors could have more than one paper in any issue of the journal.

The following facts are also known.

- F, an Indian author from the Logistics area, wrote only one paper. It was scheduled in the October issue.
- A was from the Automation area and did not have a paper scheduled in the October issue.
- None of the Indian authors were from the Manufacturing area and none of the Japanese or Chinese authors were from the Automation area.
- A and H were from different countries, but had their papers scheduled in exactly the same issues.
- C and E, both Chinese authors from different areas, had the same number of papers scheduled. Further, E had papers scheduled in consecutive issues of the journal but C did not.
- B, from the Logistics area, had a paper scheduled in the April issue of the journal.
- B and G belonged to the same country. None of their papers were scheduled in the same issue of the journal.
- D, a Japanese author from the Manufacturing area, did not have a paper scheduled in the July issue.
- C and H belonged to different areas.

**9. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

What is the correct sequence of number of papers written by B, C, E and G, respectively?

- A.
1, 2, 2, 3

- B.
1, 3, 3, 1

- C.
3, 1, 1, 3

- D.
1, 2, 2, 1

Answer: Option A

**Explanation** :

The information given in the question can be written as follows

Point (2) & (3): A has to be from India

The total number of papers written by A, D, G and H was double the total number of papers written by the other four authors

⇒ A + D + G + H = 2(B + C + E + F)

Also, A + D + G + H + B + C + E + F = 18

⇒ 3(B + C + E + F) = 18

⇒ B + C + E + F = 6 …(1)

⇒ A + D + G + H = 12 …(2)

Point (5): C = E ≥ 2 (since E has papers scheduled in consecutive issues, E must have written more than 1 paper)

From (1) we can conclude that E must have written exactly 2 papers. C would also have written exactly 2 papers.

∴ B + 2 + 2 + 1 = 6

⇒ B = 1

Also, A + D + G + H = 12. Since each person can write a maximum of 3 papers, hence the only possible value of A, D, G and H will be 3 each.

Point (7): B and G both can only be from India. Hence, H has to be from Japan.

Point (5) & (3): C and E cannot be from Automation since they are Chinese. Hence, one of C or E is from Manufacturing and the other from Logistics.

Now, since H is from Japan he cannot be from Automation, hence H can only be from Logistics.

Since, C and H have to be from different areas (9), C has to be from Manufacturing and E from Logistics.

This leaves us with G who has to be from Automation.

A has to write 3 papers and an author can write only one paper in a single issue, hence A must have written one paper each in Jan, Apr and Jul issue.

A and H had papers scheduled in same issues (4). Hence, must have written one paper each in Jan, Apr and Jul issue.

Similarly, D must have written one paper each in Jan, Apr and Oct issue.

Point (7): None of B and G’s papers were scheduled in the same issue of the journal. Hence, G must have written papers in Jan, Jul and Oct.

Point (5): E wrote papers in successive issues while C did not write in successive issues. Only possible way this can happen is when E writes in Apr and Jul while C writes in Jan and Oct.

Number of papers written by B, C, E and G is 1, 2, 2 and 3 respectively.

Hence, option (a).

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**10. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

How many papers were written by Indian authors?

Answer: 8

**Explanation** :

Consider the solution to first question of this set.

Indian authors have written 8 papers.

Hence, 8.

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**11. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

Which of the following statement(s) MUST be true?

**Statement A**: Every issue had at least one paper by author(s) from each country.

**Statement B**: Every issue had at most two papers by author(s) from each area.

- A.
Neither of the statements

- B.
Both the statements

- C.
Only Statement A

- D.
Only Statement B

Answer: Option C

**Explanation** :

Consider the solution to first question of this set.

Only statement A is correct.

Hence, option (c).

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**12. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

Which of the following statements is FALSE?

- A.
Every issue had at least one paper by author(s) from Automation area.

- B.
Every issue had exactly two papers by Indian authors.

- C.
Every issue had exactly two papers by authors from Logistics area.

- D.
Every issue had exactly one paper by a Chinese author.

Answer: Option C

**Explanation** :

Consider the solution to first question of this set.

Hence, option (b).

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**13. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

Which of the following statements is FALSE?

- A.
There was exactly one paper by an author from Manufacturing area in the April issue.

- B.
There was exactly one paper by an author from Logistics area in the October issue.

- C.
There were exactly two papers by authors from Manufacturing area in the January issue.

- D.
There were exactly two papers by authors from Manufacturing area in the July issue.

Answer: Option D

**Explanation** :

Consider the solution to first question of this set.

Hence, option (d).

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**14. CAT 2021 LRDI Slot 1 | LR - Selection & Distribution**

Which of the following is the correct sequence of number of papers by authors from Automation, Manufacturing and Logistics areas, respectively?

- A.
6, 6, 6

- B.
6, 5, 7

- C.
6, 7, 5

- D.
5, 6, 7

Answer: Option B

**Explanation** :

Consider the solution to first question of this set.

Hence, option (b).

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**Answer the next 6 questions based on the information given **

Amudha, Bharatan, Chandran, Dhinesh, Ezhil, Fani and Gowtham are seven people in a town. Any pair of them could either be strangers, acquaintances, or friends. All relationships are mutual. For example, if Amudha is a friend of Bharatan, then Bharatan is also a friend of Amudha. Similarly, if Amudha is a stranger to Bharatan, then Bharatan is also a stranger to Amudha.

Partial information about the number of friends, acquaintances, and strangers of each of these people among them is given in the table below.

The following additional facts are also known.

- Amudha, Bharatan, and Chandran are mutual strangers.
- Amudha, Dhinesh, and Fani are Ezil's friends.
- Chandran and Gowtham are friends.
- Every friend of Amudha is an acquaintance of Bharatan, and every acquaintance of Bharatan is a friend of Amudha.
- Every friend of Bharatan is an acquaintance of Amudha, and every acquaintance of Amudha is a friend of Bharatan.

**15. CAT 2021 LRDI Slot 1 | LR - Puzzles**

Who are Gowtham’s acquaintances?

- A.
Bharatan, Dhinesh and Ezhil

- B.
Amudha, Dhinesh and Fani

- C.
Dhinesh, Ezhil and Fani

- D.
Amudha, Bharatan and Fani

Answer: Option C

**Explanation** :

Amudha, Bharatan, and Chandran are mutual strangers.

Amudha, Dhinesh, and Fani are Ezil's friends.

Chandran and Gowtham are friends.

Every friend of Amudha is an acquaintance of Bharatan, and every acquaintance of Bharatan is a friend of Amudha. And every friend of Bharatan is an acquaintance of Amudha, and every acquaintance of Amudha is a friend of Bharatan.

Since Ezil is Amudha’s friend Ezil will be Bharatan’s acquaintance

Gautam has 3 acquaintances and 2 strangers hence Gautam will have 1 friend.

Fani also has 1 friend.

We can see from the table that Fani and Gautam already have one friend and the remaining people will be either acquaintances or strangers.

Now, if Fani is an acquaintance of Amudha/Bharatan, he will be a friend of Bharatan/Amudha. Thus Fani will have 2 friends which is not possible. Hence, Fani will be a stranger to both Amudha and Bharatan

We can use the same logic for Gautam and conclude that Gautam will be a stranger to both Amudha and Bharatan.

Now, Gautam has 3 acquaintances, these will be Dhinesh, Ezhil and Fani.

Amudha has 1 acquaintance, this can only be Dhinesh. Since Dhinesh is Amudha’s acquaintance, he will be Bharatan’s friend.

Dhinesh has two strangers, hence Chandran and Fani will be strangers to Dhinesh.

Ezil has one stranger, this can only be Chandran.

Chandran has one acquaintance and this will be Fani.

Hence, we get the final table for all relationships.

Gautham’s acquaintances are Dhinesh, Ezil and Fani.

Hence, option (c).

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**16. CAT 2021 LRDI Slot 1 | LR - Puzzles**

Which of these pairs share the same type of relationship?

- A.
(Bharatan, Ezhil) and (Fani, Gowtham)

- B.
(Bharatan, Chandran) and (Dhinesh, Ezhil)

- C.
(Chandran, Ezhil) and (Dhinesh, Gowtham)

- D.
(Amudha, Gowtham) and (Ezhil, Fani)

Answer: Option A

**Explanation** :

Consider the solution to first question of this set.

Bharatan and Chandran are acquaintances while Dhinesh and Ezhil are also acquaintances.

Hence, option (a).

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**17. CAT 2021 LRDI Slot 1 | LR - Puzzles**

Who is an acquaintance of Amudha?

- A.
Ezhil

- B.
Dhinesh

- C.
Fani

- D.
Gowtham

Answer: Option B

**Explanation** :

Consider the solution to first question of this set.

Dhinesh is an acquaintance of Amudha.

Hence, option (b).

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**18. CAT 2021 LRDI Slot 1 | LR - Puzzles**

Who is an acquaintance of Chandran?

- A.
Dhinesh

- B.
Bharatan

- C.
Fani

- D.
Ezhil

Answer: Option C

**Explanation** :

Consider the solution to first question of this set.

Fani is an acquaintance of Chandran.

Hence, option (c).

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**19. CAT 2021 LRDI Slot 1 | LR - Puzzles**

How many friends does Ezhil have?

Answer: 3

**Explanation** :

Consider the solution to first question of this set.

Ezil has 3 friends, i.e., Amudha, Dhinesh and Fani.

Hence, 3.

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**20. CAT 2021 LRDI Slot 1 | LR - Puzzles**

How many people are either a friend or a friend-of-a-friend of Ezhil?

Answer: 4

**Explanation** :

Consider the solution to first question of this set.

Ezil’s direct friends are Amudha, Dhinesh and Fani while friends of friends is Bharatan (Dhinesh’s friend).

Hence, 4.

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