# Thread: A number puzzle that might send you insane

1. ## A number puzzle that might send you insane

Good afternoon.

Here's a nice, simple-looking number puzzle I came across recently.

Make 24 using the numbers 1, 4, 5 and 6.

Each number must be used exactly once.

The allowed operations are add, subtract, multiply and divide.

You cannot use powers.

You cannot concatenate numbers (i.e. you can't use 4 and 5 to make 45).

You can use brackets.

There are two solutions, but they are maddeningly difficult to find.

Good luck,

clop

2. If there is any kind of "spoiler" feature on this board, I can't find it - is there one?

3. OK, I posted the answer here, at another forum, because I know how to use the spoiler feature there. If there is one here, I don't know how to use it. . .

4. Wow wicked, did you work them both out yourself?

clop

5. Originally Posted by clop
Wow wicked, did you work them both out yourself?

clop
Yes, although the approach was a lot closer to brute force than I would like to admit

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