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Find the odd one out.

1. 2 : 4 : 16
2. 3 : 6 : 36
3. 4 : 8 : 64
4. 5 : 10 : 120

Correct answer: 5 : 10 : 120

Solution

In the first three options, the third number is the square of the second number: 4^2 = 16, 6^2 = 36, and 8^2 = 64. In the last option, 10^2 = 100, not 120, so it is the odd one out.

Related SSC CGL (Prelims) General questions

• What comes in place of (?) in the series: 2, 6, 18, 54, ?
• What comes next? 8, 20, 44, 92, ?
• One number does not fit into the given factorial series. Identify it: 3, 6, 24, 120, 720, 800.
• What should come at the place of the question mark (?) in the following series? 2, 3, 8, 9, 26, 27, ?
• Choose the odd one out:
• Complete the pattern: 120, 96, 76.8, 61.44, ?

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