Add Up

A simple number puzzle based on a triangular grid. Given a few pre-set numbers, the puzzle is solved using addition and subtraction. The puzzle has been a staple in Quizkids for many years.

Related puzzles:

Set Square
The illustration of the puzzle Download example puzzle

Instructions:

With each number being the sum of the two numbers below it, calculate the top number in the pyramid.

Appears in:

Puzzler Number-Fit, Puzzler Quiz Kids, Puzzler Special