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Samarth is ranked sixth from the top and twentieth from the bottom in a class. How many students are there in this class?
Answer: C
When certain number of people are arranged according to a particular criteira, then
Total number of people = position of a person from the top + position of the same person from bottom – 1.
∴ Number of students = 6 + 20 – 1 = 25.
Hence, option (c).
In a row of 38 boys, Ranu became 19th from left when he shifted five places to the right. What was his earlier position from the right end of the row?
Answer: B
Original position of Ranu from the left = 19 – 5 = 14th
The row had 38 boys.
∴ There were originally 38 − 14 = 24 people to his right.
Hence, his earlier position from the right end = 24 + 1 = 25th.
Hence, option (b).
Neha is 7 ranks ahead of Ashutosh who ranks 25th in a class of 40. What is Neha’s rank from the end?
Answer: A
Ashutosh ranks 25th and Neha is 7 ranks ahead of Ashutosh.
∴ Neha ranks 25 − 7 = 18th
Number of students behind Neha in rank = 40 – 18 = 22
Hence, Neha’s rank from the last = 22 + 1 = 23rd
Hence, option (a).
In a row of boys, Alok is 4th from left and Yash is 30th from right. If they exchange their positions, Alok becomes 21st from left. How many boys are there in the row?
Answer: C
After the exchange, Alok comes to Yash’s position and becomes 21st from left.
The same position also corresponds to the 30th position from right.
∴ Total number of boys in the row = (position of Yash from left) + (position of Yash from right) – 1
= 21 + 30 – 1 = 50.
Hence, option (c).
Bhanu is ranked 15th from the top and 25th from the bottom in a class. If three new students join the class, how many students are now in this class?
Answer: C
Original number of students = position from top + position from bottom − 1
= 15 + 25 − 1 = 39
When three new students join, new total = 39 + 3 = 42.
Hence, option (c).
In a row of boys and girls, Paras is 17th from left and Rekha is 32nd from right. If they interchange positions, Paras becomes 26th from left. How many boys are there in the row?
Answer: E
In this question we can find out the total number of people in the row.
Since no data is given related to number of boys or girls we won’t be able to find the exact number of boys or girls.
Hence, the number of boys cannot be found.
[We can find the total number of people in the line but not the number of boys or girls.]
Hence, option (e).
In a row of girls, Ranya is 15th from left and Tanya is 19th from right. If Ranya is 19th from right, what is the position of Tanya from left?
Answer: C
Total number of people = position of a person from the left + position of the same person from right – 1.
If the position of A from left and right is known, and the position of B from any one end is known, the position of B from the other end can also be found.
∴ Ranya’s position from left + Ranya’s position from right = Tanya’s position from left + Tanya’s position from right
∴ 15 + 19 = Tanya’s position from left + 19
∴ Position of Tanya from left = 15th
Hence, option (c).
In a row of boys, Anay is 14th from the end and 17th from the start. In another row of girls, Pooja is 16th from the start and 11th from the end. How many boys and girls are there in both the rows together?
Answer: D
Total boys in Anay’s row = 14 + 17 − 1 = 30
Total girls in Pooja’s row = 16 + 11 − 1 = 26
∴ Total boys and girls in both rows = 30 + 26 = 56.
Hence, option (d).
In a row of boys facing north, A is 21st from the left and B is 9th from the right. C is 5th to the right of A and 7th to the left of B. How many boys are there in the row?
Answer: D
A is 21st from the left end and C is 5th to the right of A. So, C is 21 + 5 = 26th from the left end.
B is 9th from the right end and C is 7th to the left of B. So, C is 9 + 7 = 16th from the right end.
∴ Total number of boys in the row = 26 + 16 − 1 = 41.
Hence, option (d).
In a queue, Mayank is 8th from the front while Ankita is 16th from behind. Astha is exactly in between the two. If there are 25 people in the queue, what is Astha’s position from the front?
Answer: B
Ankita is 16th from behind and there are 25 people in the queue.
∴ Ankita’ position from front = 25 + 1 − 16 = 10th
Mayank is 8th from front and Astha is exactly between Mayank and Ankita.
∴ Astha is 9th from front.
Hence, option (b).
