Question

These cards can be sorted into three pairs, where

each pair adds to the same number. What is this
number?
-8
0
-3
4
-1
-4

Answer 1

To determine which pairs of these numbers add up to the same number, you can start by grouping them in different combinations. Here are the possible pairs:

(-8, 4)

(0, 0)

(-3, 3)

(-1, -4)

Now, let's calculate the sums for each pair:

(-8 + 4) = -4

(0 + 0) = 0

(-3 + 3) = 0

(-1 + -4) = -5

Out of these pairs, two of them add up to 0. So, the common number that each pair adds to is 0.

Explanation: