Question : Directions: The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) is/are followed in all the number pairs except one. Find that odd number pair.
Option 1: 2 : 9
Option 2: 6 : 21
Option 3: 10 : 33
Option 4: 8 : 29
Correct Answer: 8 : 29
Solution :
Let's check the options –
First option:
2 : 9; (2 × 3) + 3 = 6 + 3 = 9
Second option:
6 : 21; (6 × 3) + 3 = 18 + 3 = 21
Third option:
10 : 33; (10 × 3) + 3 = 30 + 3 = 33
Fourth option:
8 : 29; (8 × 3) + 3 = 24 + 3 = 27 ≠ 29
So, only the fourth option is different from the other three. Hence, the fourth option is correct.
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