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
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.