Question

How can you move just one number to a different

triangle to make the sum of the numbers in each
triangle equal? (Hint: There do not have to be
exactly 3 numbers in each triangle.)

Answer 1

Remove 9 from triangle B to A

Explanation:

Given

Three Triangles

A: 1,2,3

B: 7,8,9

C: 4,5,6

Required

Make their sum equal

First, we need to calculate the sum in each triangles;

`A = 1 + 2 + 3`

`A = 6`

`B = 7 + 8 + 9`

`B = 24`

`C = 4 + 5 + 6`

`C = 15`

Remove 9 from triangle B to A

`A = 6 + 9`

`A = 15`

`B = 24 - 9`

`B = 15`

At this point, we have:

`A = 15`
`B = 15`
`C = 15`

Hence, the solution is to remove 9 from B to A