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A number n satisfies: when you add up all factors of n that are less than n, you get a number greater than n.
Such a number is called 'abundant'.
Which of the following is abundant?

Class 6Factors and MultiplesPlaying with Numbers
  • A8
  • B10
  • C12
  • D14

Step-by-Step Solution

For 12, factors below 12 are 1,2,3,4,6 and their sum is 16, which is greater than 12. The others: 8 gives 1+2+4=7, 10 gives 1+2+5=8, 14 gives 1+2+7=10 — all less than the number.
Answer: C) 12

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