What number follows in the sequence 2, 3, 4, 8, 9, 10, 20, 21, 22?

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To determine the next number in the series 2, 3, 4, 8, 9, 10, 20, 21, 22, let’s analyze the pattern:

  • The series begins with 2, 3, and 4, which are consecutive numbers.
  • After that, we have 8, 9, and 10. Again, these are consecutive numbers, but they follow the number 4.
  • Next, we see 20, 21, and 22, which are consecutive numbers as well, following the number 10.

From this observation, we can establish a pattern where every three numbers are consecutive, and between every three consecutive numbers there is a number that is double the last number of the previous set:

  1. From 4, we double to get 8.
  2. From 10, we double to get 20.

Following this pattern, the series is structured as follows:

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

The next number after 22 should be the consecutive number, which is 23. Therefore, the sequence continues with:

The next number in the series is 23.

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