Multiple choice

Which is the smallest perfect number?

  1. 2

  2. 6

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A perfect number is a positive integer equal to the sum of its proper divisors (excluding itself). 6 is the smallest perfect number because its proper divisors are 1, 2, 3, and 1 + 2 + 3 = 6. The next perfect number is 28 (1 + 2 + 4 + 7 + 14 = 28). 2, 3, and 4 are not perfect numbers as their proper divisors don't sum to themselves.

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