Question

From a set of numbers 1-15, how many numbers should be picked to form pair of numbers that adds up to 16? Illustrate the solution.

Answer 1

From a set of numbers 1-15 we can select 14 numbers so that we can form a pair that adds up to 16.

This can be explained as below,

The number 8 does not have any other number except itself that gives a sum of 16 so we cannot select '8' to form a pair.