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

37 : 100: 24: ? :: 29: 76

61

Logic followed here is : 

(1st number × 3) - 11 = 2nd number

So,

    37 : 100

​(37 × 3) - 11 = 100

111 - 11 = 100

100 = 100 (LHS = RHS)

And,

    29 : 76

​(29 × 3) - 11 = 76

87 - 11 = 76

76 = 76 (LHS = RHS)

Similarly,

    24 : ?

​​(24 × 3) - 11 = ?

72 - 11 = 61

61 is correct answer .