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.)

Remove 9 from triangle B to A

Step-by-step 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;

Remove 9 from triangle B to A

At this point, we have:

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

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step-by-step explanation:

70

step-by-step explanation: