Question : Directions: Three of the following four triads are alike in a certain way as they are formed by performing the same mathematical operations among themselves and thus form a group. Which triad does NOT belong to that group?
Option 1: 2 : 5 : 8
Option 2: 5 : 10 : 125
Option 3: 12 : 25 : 1728
Option 4: 3 : 7 : 27
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Correct Answer: 5 : 10 : 125
Solution : Let's check the given options – First option: (2 : 5 : 8)→((2 × 2) + 1) = 4 + 1 = 5; (2) 3 = 8 Second option: (5 : 10 : 125)→((5 × 2) + 1) = 10 + 1 = 11 ≠ 10; (5) 3 = 125 Third option: (12 : 25 : 1728)→((12 × 2) + 1) = 24 + 1 = 25; (12) 3 = 1728 Fourth option: (3 : 7 : 27)→((3 × 2) + 1) = 6 + 1 = 7; (3) 3 = 27
So, only the second option is different from the others. Hence, the second option is correct.
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Question : Directions: Three of the following four triads are alike in a certain way as they are formed by performing the same mathematical operations among themselves and thus form a group. Which triad does not belong to that group?
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