82 : 36 ∷ 91 : ?

Question:

82 : 36 ∷ 91 : ?

A169

B100

C47

D64

Answer:

D. 64

Explanation:

8 - 2 = 6, 6 × 6 = 36 Similarly, 9 - 1 = 8, 8 × 8 = 64

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