Question

Four distinct integers a, b, c and d have the property that when added in pairs, the sums 16, 19, 20, 21, 22, and 25 are obtained. What are the four integers in increasing order?

Answer 1

Answer: The four integers are: 6,8,11 and 14

Explanation:

The attachments below contains step-by-step explanations of the guessing and checking approach that would be used to arrive at the answer.

The calculations on the attachments is from left to right.