Multiple choice general knowledge math & puzzles

Identify the Super Perfect Number

  1. 16

  2. 32

  3. 64

  4. 128
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

A Super Perfect Number is a number n such that σ(σ(n)) = 2n. For n=16: σ(16)=31, σ(31)=32 (2*16). For n=64: σ(64)=127, σ(127)=128 (2*64). Both 16 and 64 are super perfect numbers. This is an MC-2 (multiple choice, multiple correct) question.

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