1) devise five different rules^**/*****
Now devise five different rules to divide these 6 numbers into two groups of three numbers.
Spoiler: one rule might be: even numbers go left, odd numbers go right. Or : both groups add up to 15.

2) devise eight different rules^**/*****
Devise as many dufferent rules to divide these 8 numbers into 2 groups of 4 numbers.

This game was described by “The Barrcast” in a youtube film titled “Rule finding games”.

New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars. You can find 8 rules here, but if you think hard enough you will probably be able to come up with additional rules.