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  9. Q118

TNPSC Group-I 2021 · Question 118 of 148

If A = 2^65 and B = 2^64 + 2^63 + 2^62 + ... + 2^0, which of the following is true?

Aptitude - Number System

  1. AB is larger than A by 1
  2. BA is larger than B by 1Correct
  3. CA and B are equal
  4. DB is 2^64 more than A

Answer: B. A is larger than B by 1

Explanation

B = 2^64 + 2^63 + ... + 2^0 = 2^65 - 1, so A (= 2^65) is larger than B by 1.

Source: TNPSC Group-I Prelims (held 3 Jan 2021) - official paper via examrace.com

← Q117View full paper (148 questions)Q119 →

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