Find the missing number(s) : (A) 60 (B) 50 (C) 21 (D) 25

1.	Find the missing number(s) : (A) 60 (B) 50 (C) 21 (D) 25
Answer» The square of the number at the bottom is equal to the product of the two upper numbers. Thus, In first figure, 4 × 9 = 6² = 36. In second figure, 9 × 16 = 12² = 144. Let the missing number in third figure be x. Then, 16 × x = 20² = 400 or x = 400/16 =25 Ans. (D) 25

Answer»

The square of the number at the bottom is equal to the product of the two upper numbers. Thus, In first figure, 4 × 9 = 6² = 36.

In second figure, 9 × 16 = 12² = 144.

Let the missing number in third figure be x.

Then, 16 × x = 20² = 400 or x = 400/16 =25

Ans. (D) 25

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