Game Rules ## Object of the Game

Find and count all equations that result in the given Equas from 13 to 24, when you calculate any three adjacent numbers in the square grid.

## How to Play

• You are given a prefilled grid and a list of all Equas that can be found from 13 to 24.
• There’s always at least one equation that can be made to satisfy each result.
• As a hint, you will know the total number of equations that can be found.
• Use the work area to write down all equations you find.
• In this game, adjacent numbers are three numbers connected vertically, horizontally or in an “L” shape, as shown in the diagram below.   • Use only basic arithmetic functions: addition, subtraction, multiplication, division; and follow the order of operations when necessary

## Example In this 2×2 grid, our task is to count Equas from 13 to 24. Also, we know that there is a total of 18 equations that can be found.

Solution:

Equa-13 (2): 6 + 3 + 4 = 13, 1 + 3 x 4 = 13
Equa-14 (1): 6 x 3 – 4 = 14
Equa-15 (2): (6 – 1) x 3 = 15, (1 + 4) x 3 = 15
Equa-16 (1): (3 + 1) x 4 = 16
Equa-17 (1): 6 x 3 – 1 = 17
Equa-18 (3): 6 x 3 : 1 = 18, 6 + 3 x 4 = 18, (4 – 1) x 6 = 18
Equa-19 (1): 1 + 6 x 3 = 19
Equa-20 (1): (6 – 1) x 4 = 20
Equa-21 (2): (6 + 1) x 3 = 21, 6 x 4 – 3 = 21
Equa-22 (1): 4 + 6 x 3 = 22
Equa-23 (1): 6 x 4 – 1 = 23
Equa-24 (2): (3 + 1) x 6 = 24, 6 x 4 : 1 = 24

As we can see, solution for this puzzle is correct.