Multiple choice

Directions: Complete the following analogies:

6 : 5 :: 15 : ?

  1. 9

  2. 8

  3. 7

  4. 10

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Since second term of the analogy is the sum of prime factors of the first term, that means5 = (2 + 3) (2 and 3 are the prime factors of 6). Similarly 8 = (3 + 5) ( 3 and 5 are the prime factors of 15), so it is a correct answer.

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