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Select the option that is related to the third number in the same way as the second number is related to the first number.

3978 ∶ 72 ∶∶ 5172 ∶ ? 


1. 98
2. 51
3. 27
4. 66

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Correct Answer - Option 2 : 51

Given,

3978 ∶ 72 ∶∶ 5172 ∶ ? 

The pattern followed here is,

3978 = 3 + 9 + 7 + 8 = 27

Arrange the above addition in reverse order,

∴ 27 = 72

Similarly,

5172 = 5 + 1 + 7 + 2 = 15

Arrange the above addition in reverse order,

∴ 15 = 51

Hence, the correct answer is 51.

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