Discussion

Explanation:

We know, 23 = 8.

∴ In the number 1101 make pairs of 3 digits starting from right and write them in base 10.

 1    101
P2    P1

P1: (101)2 = 5.

P2: (1)2 = 1.

∴ The final answer is (1101)2 = (15)8.

Hence, 15.

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