Question : Directions: In the following question, select the missing number from the given responses. If (7 × 8 )/9 = 3; (8 × 9)/144 = 12; (10 × 11)/169 = 13; then (12 × 13)/441 = ?
Option 1: 196
Option 2: 225
Option 3: 144
Option 4: 21
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Correct Answer: 21
Solution : Here, in each equation, the number in the denominator of L.H.S. is the square of the number in R.H.S. Like, (7 × 8)/9 = 3→√9 = 3 (8 × 9)/144 = 12→√144 = 12 (10 × 11)/169 = 13→√169 = 13 Similarly, for (12 × 13)/441→√441 = 21
Therefore, the missing number is 21. Hence, the fourth option is correct.
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Question : Directions: In the following question, select the missing number from the given series. 169, 196, 225, 256, ?
Question : Directions: Some equations are solved on the same basis, find out the correct answer for the unsolved equation. If 2 × 16 = 8, 8 × 8 = 1, 6 × 12 = 2, then 12 × 144 = ?
Question : Directions: In the following question, select the related number from the given alternatives. 144 : 13 :: 49 : ?
Question : Directions: Find the missing number from the given responses.
Question : Directions: Which two signs and two numbers (Not digits) of the equation should be interchanged to make it correct? 13 × 12 ÷ 36 + 11 – 7 = 35
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