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View Full Version : A number puzzle that might send you insane

clop
2006-Jun-12, 03:43 AM
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. :wall:

Good luck,

clop

montebianco
2006-Jun-12, 11:34 PM
If there is any kind of "spoiler" feature on this board, I can't find it - is there one?

montebianco
2006-Jun-12, 11:43 PM
OK, I posted the answer here (http://www.illuminati-r-us.com/Forums/viewtopic.php?t=1882), 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. . .

clop
2006-Jun-13, 12:23 AM
Wow wicked, did you work them both out yourself?

clop

montebianco
2006-Jun-13, 02:01 AM
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 :)