Question : Directions: The second number in the given number pairs is obtained by performing certain mathematical operations(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair?
Option 1: 9 : 26
Option 2: 5 : 17
Option 3: 3 : 13
Option 4: 8 : 23
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Correct Answer: 9 : 26
Solution :
Let's check each option –
First option:
9 : 26; (9 × 2) + 7 = 18 + 7 = 25 ≠ 26
Second option:
5 : 17; (5 × 2) + 7 = 10 + 7 = 17
Third option:
3 : 13; (3 × 2) + 7 = 6 + 7 = 13
Fourth option:
8 : 23; (8 × 2) + 7 = 16 + 7 = 23
So, only the first option doesn't follow the same pattern as followed by the given set of numbers. Hence, the first option is correct.
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