Solutions
The logic followed here is :-
1st + 3rd number = 2nd number × (1st - 3rd number)
(72, 11, 60)
72 + 60 = 11 × (72 - 60)
132 = 11 × 12
= 132 = 132.
For, (48, 5, 32)
48 + 32 = 5 × (48 - 32)
80 = 5 × 16
= 80 = 80.
Similarly, for (64, 15, 56)
64 + 56 = 15 × (64 - 56)
120 = 15 × 8
120 = 120.
Hence, the correct answer is "(64, 15, 56)".
Alternate Method
Second number = (First number ÷ (First number - Third number)) + (Third number ÷ (First number - Third number))
(72, 11, 60) → (72 ÷ (72 - 60)) + (60 ÷ (72 - 60)) = (72 ÷ 12) + (60 ÷ 12) = 6 + 5 = 11
And
(48, 5, 32) → (48 ÷ (48 - 32)) + (32 ÷ (48 - 32)) = (48 ÷ 16) + (32 ÷ 16) = 3 + 2 = 5
Similarly,
(64, 15, 56) → (64 ÷ (64 - 56)) + (56 ÷ (64 - 56)) = (64 ÷ 8) + (56 ÷ 8) = 8 + 7 = 15
Hence, the correct answer is "(64, 15, 56)".