We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. You also agree to our T&C.

If you have a very tight nut on a bolt, what is the best way to free it:

Heat it, cool it, either, neither?

[Ref: ZDBK]

Hint: Do things get larger or smaller when you heat them?

Answer: Heat it.

The nut will increase in size more than the bolt, this makes the hole in the nut larger so freeing the joint.

Puzzle 1518

I once cashed a cheque at the bank. I had spent £2.84 before I realised the bank clerk had made a mistake. He had transposed the pounds with the pence. I now had exactly 5 times the value of the original cheque. What was the original cheque's value?

The sequence is created using: x1 +1 x2 +2 x3 +3 x4 +4.

We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. For more information please view our privacy policy. By using the site you also agree to our terms and conditions.