Choose the number which is different from the others.

295

The correct answer is Option (1) → 295

295 is the odd one out.

Reason: sum of digits —

• 295 → 2+9+5 = 16 (not divisible by 3)
• 552 → 5+5+2 = 12 (divisible by 3)
• 729 → 7+2+9 = 18 (divisible by 3)
• 906 → 9+0+6 = 15 (divisible by 3)

So 552, 729 and 906 are divisible by 3, while 295 is not.