Question

12: 65 ::7:?
(A) 35
(B) 40
(C) 55
(D) 50
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Answer 1

Answer:

The question is 12: 65 ::7:?

The relation is that n : 5n+5

for n=12

5n+12=65

similarly for n=7

5n+12=40

so your correct answer is 40

hope so it helps you