Puzzles - Number puzzles

Answer

:

4

Explanation

:

In each triangle, the central number equals the sum of the three outer numbers divided by two.

Answer

:

5

Explanation

:

In each star, the central number equals the difference between the sum of the even numbers and the sum of the odd numbers from the points of the star.

Answer

:

5

Explanation

:

In each triangle, the number at the apex of the triangle equals the average of the two numbers at the bottom.