Another game we can play…

The goal of this game is to make 21. You have the four numbers 1, 5, 6 and 7 and you can use any combination of multiplication, addition, division, subtraction and bracketing. And that’s it, that’s all there is to it.

I know of one solution, and with a slightly charitable interpretation of the question found two more. There could be others.

Edit: Any solution must use each of the numbers 1, 5, 6 and 7 exactly once each

A game we can play

Here is a sequence of numbers:

  • 2, 4, 6

What is the rule for generating the next number? If you post a comment I’ll tell you if it’s right or wrong, and if you post another sequence of numbers I’ll tell you if it fits the generating rule.

PS: Don’t google this one, that kind of spoils it 🙂