Work in a group of 2-3 to solve these problems.
Number Task
4, 12, 14, 16, 18, 20, 21, 27, 35, 36
Sort the numbers into two groups in as many ways as you can.
For example:
Odd and Even numbers
Multiples of 2 (2 x tables)
https://nrich.maths.org/6343