Copyright © University of Cambridge. All rights reserved.

'Sums of Pairs' printed from http://nrich.maths.org/

Show menu


Jo has three numbers which she adds together in pairs.

When she does this she has three different totals: $11$, $17$ and $22$

What are the three numbers Jo had to start with?

Can you describe a method that would enable you to work out the three numbers given any three totals?