Which number will replace the question mark?(1)(1) 81 (2) 68 (3) 100

1.	Which number will replace the question mark?(1)(1) 81 (2) 68 (3) 100 (4) 121(2)(1) 29 (2) 31 (3) 28 (4) 33(3)(1) 1.61 (2) 10.50 (3) 12.25 (4) None
Answer» (1) (3) 100 (3 + 4)² = 49, (7 + 5)² = 144 (5 + 1)² = 36 ⇒ (8 + 2)² = 100 (2) (1) 29 21 – 11 = 10/2 = 5 33 – 17 = 16/2 = 8 29 – 15 = 14/2 = 7 (3) (1) 1.61 (4²+ 3²) / (2 + 5) = 2.50 (6² + 8² ) / (4 + 2) = 12.50 Similarly, (5² + 2² ) / (9 + 2) = 1.61

Which number will replace the question mark?(1)(1) 81 (2) 68 (3) 100 (4) 121(2)(1) 29 (2) 31 (3) 28 (4) 33(3)(1) 1.61 (2) 10.50 (3) 12.25 (4) None

Answer»

(1) (3) 100

(3 + 4)² = 49, (7 + 5)² = 144

(5 + 1)² = 36

⇒ (8 + 2)² = 100

(2) (1) 29

21 – 11 = 10/2 = 5

33 – 17 = 16/2 = 8

29 – 15 = 14/2 = 7

(3) (1) 1.61

(4²+ 3²) / (2 + 5) = 2.50

(6² + 8² ) / (4 + 2) = 12.50

Similarly,

(5² + 2² ) / (9 + 2) = 1.61

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Which number will replace the question mark?(1)(1) 81 (2) 68 (3) 100 (4) 121(2)(1) 29 (2) 31 (3) 28 (4) 33(3)(1) 1.61 (2) 10.50 (3) 12.25 (4) None

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