Question

These cards can be sorted into three pairs, where each pair adds tc same number. What is this number?

3
-8
-5
3
-2
0

Answer 1

-5

Explanation:

The number is -5.

-8 & 3

-5 & 0

-3 & -2

All of these pairs add up to -5, so -5 is the number. :)