Puzzles - Number puzzles

Answer

:

6

Explanation

:

In each triangle, add together the lower two digits and subtract 2 for the left hand triangle, 3 for the middle and 4 for the right hand triangle, putting the result at the apex of the triangle.

Answer

:

9

Explanation

:

Add together the four outer numbers in each diagram. Divide this answer by two to get the middle number.

Answer

:

12

Explanation

:

In each triangle, the central value equals the average of the 3 values around the outside.