The basis of Sum is simple. Everyone learns addition very early on in their schooling and every single day after that you begin adding something in your every day life. Since you have so many years of experience you should be amazing at addition, but are you?
The game is straightforward and simple –
It game consists of a 3×3 grid. 5 numbers are generated at random, in random places of the grid.
You get 90 seconds to find as many combinations as possible.
To make a combination, you have to select the “SUM” first, followed by the two numbers that add up to the sum.
• Correct combination: 20 = 8 + 12 OR 20 = 12 + 8
• Wrong combination: 8 + 12 = 20 OR 12 + 8 = 20
Scoring a correct combination gives you 3 seconds more, whereas a wrong combination will deduct 5 seconds from your remaining time.
Each time you pass a level, you get a bonus 30 seconds of more time.
Some other neat features it has are stats to see how you are doing, different levels, ability to play with friends, and best of all does not require an internet connection. What is even more impressive is the game features no ads and no permissions. Not only is the game fun, but has been scientifically proven to help train your brain and make it think faster on other tasks. I don’t see any reasons not to give this one a shot.