Four pairs of numbers have been given, out of which three are alike in some manner, while one is different. Choose out the odd one.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 81: 9: 19.
| Understanding |
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The pattern is The square root of 1st term + square root of 2nd term = 3rd term In option 1 (64 : 100 : 18) √ 64 + √100 = 8 + 10 = 18 In option 2 (25 : 16 : 9) √25 + √16 = 5 + 4 = 9 In option 3 (16 : 64 : 12) √16 + √64 = 4 + 8 = 12 In option 4 (81: 9: 19) √81 + √9 = 9 + 3 = 12 ≠ 19. Hence, option 4 i.e. 81: 9: 19 is the correct answer. |