Kate wrote this list of numbers on the board.

3, 7, 11, 15, 19, ...

Which number that follows the pattern should Kate write next?
27, 23, 21, 20

1 answer

The pattern seems to be increasing by 4 each time: 3 + 4 = 7, 7 + 4 = 11, 11 + 4 = 15, 15 + 4 = 19.

Following this pattern, the next number should be 19 + 4 = 23.

Therefore, Kate should write 23 next.