Question

5. The "primer" of a number is equal to the sum of all of its distinct prime factors. The primer of 10 is also equal to the primer of which one of the following? E. 12 F. 14 G. 20 H. 30

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Answer 1

Hi,

Answer G:20

Explanation:

primer(10)=primer(2*5)=2+5=7

primer(12)=primer(2²*3)=2+3=5

primer(14)=primer(2*7)=2+7=9

primer(20)=primer(2²*5)=2+5=7

primer(30)=primer(2*3*5)=2+3+5=10

Answer G: 20