Number families

How many different number families can you find?

Problem

Number Families printable sheet

 

How many different sets of numbers with at least four members can you find in the numbers in this box?

 

Image
A box with the following numbers: 2, 3, 8, 13, 17, 27, 36, 39, 49, 51, 56, 64, 91, 119, 121, 125, 136, 143.

 

For example, one set could be multiples of $4$ {$8, 36 ...$}, another could be odd numbers {$3, 13 ...$}.