Odd One Out · Question 27 · Hard
Find the odd one out:
- 6
- 496
- 28
- 120
Answer and explanation
Answer: D. 120
Explanation: 6, 28 and 496 are perfect numbers (each equals the sum of its proper divisors, e.g. 1 + 2 + 3 = 6). 120 is not: its proper divisors add up to 240.
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