# square numbers challenge

25 Feb 2014

Using the numbers 1 to 17 exactly once, make a list where every pair of terms sum to a square number. For example

each pair of numbers here sums to a square number:

$5+11=16$,

$11+14=25$,

$14+2=16$,

$2+7=9$.

## useful information

• the pairs of numbers can sum to the same square number, e.g. $5+11 = 16$ and $14 + 2 = 16$.