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: 12 : 47 : 60
Option 2: 4 : 16 : 20
Option 3: 2 : 7 : 10
Option 4: 5 : 19 : 25
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Correct Answer: 4 : 16 : 20
Solution :
Let's check the given options –
First option:
12 : 47 : 60; (12 + 47) + 1 = 59 + 1 = 60
Second option:
4 : 16 : 20; (4 + 16) + 1 = 20 + 1 = 21
≠ 20
Third option:
2 : 7 : 10; (2 + 7) + 1 = 9 + 1 = 10
Fourth option:
5 : 19 : 25; (5 + 19) + 1 = 24 + 1 = 25
So, the second option does not follow the same pattern as followed by the other three options. Hence, the second option is correct.
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