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: 5 : 20
Option 2: 4 : 12
Option 3: 7 : 42
Option 4: 6 : 36
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Correct Answer: 6 : 36
Solution :
Let's check the options –
First option:
5 : 20; 5
2
= 25 ≠ 20
Second option:
4 : 12; 4
2
= 16 ≠ 12
Third option:
7 : 42; 7
2
= 49 ≠ 42
Fourth option:
6 : 36; 6
2
= 36
So, the fourth option is different from the other three options as 36 is a perfect square. Hence, the fourth option is correct.
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