SSC CHSL 3 FEB 2017 SHIFT 3 TIER 1 REASONING QUESTION 8

Choose the odd word/letters/number/number pair from the given alternatives.
Options:
1. 926
2. 122
3. 225
4. 491
Answer: 3 or 4

One Solution
491 is a prime number where other are not.

Another Solution
Except 225 others have a prime factor
926 = 2 * 463(prime no.)
122 = 2 * 61(prime no.)
225 = 3 * 3 * 5 * 5
491 = 491(prime no.) * 1