Find the missing number from the series.

3, 6, _______, 36, 108

This question was previously asked in

PGCIL DT Electrical 13 Aug 2021 Official Paper (NR I)

- 24
- 14
- 20
- 18

Option 4 : 18

Let the missing term be 'x'. The given series can now be written as:

3, 6, x, 36, 108

The logic can be defined as:

∴ x = 6 × 3 = 18

__Cross-Verification__:

18 × 2 = 36

36 × 3 = 108

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