# Which Number Comes Next in This Series: 2, 3, 4, 8, 9, 10, 20, 21, 22, ?

## Question: Which number comes next in this series: 2, 3, 4, 8, 9, 10, 20, 21, 22, ?

The given series follows a special pattern.

## Answer: The next number that comes in the series 2, 3, 4, 8, 9, 10, 20, 21, 22, is 44.

Let us find the next number in the series.

## Explanation:

The series is 2, 3, 4, 8, 9, 10, 20, 21, 22

Let us break the series into groups of 3 numbers and investigate:

- 2, 3, 4
- 8, 9, 10
- 20, 21, 22

The starting number of the next set is twice the last number in the previous set [ as 4 = 2 × 2 ; 8 = 4 × 2 ; 20 = 10 × 2 ]

Similarly, the next set starts with 22 × 2 which is 44.

So, the series is 2, 3, 4, 8, 9, 10, 20, 21, 22, 44, 45, 46, 92, 93, 94, ............ so on.

### Thus, the next number of the series is 44.

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