Choose the one which is different from the rest.

The correct answer is Option (2) → 2514

All four numbers are even, so a finer test is needed. A number is divisible by 4 when the number formed by its last two digits is divisible by 4.

• 1568: 68 = 4 × 17, so it is divisible by 4

• 2514: 14 is not a multiple of 4, so 2514 is not divisible by 4; so 2514 is the odd one out

• 1432: 32 = 4 × 8, so it is divisible by 4

• 2628: 28 = 4 × 7, so it is divisible by 4