Number families

How many different number families can you find?

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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 {$3, 13 ...$}.