Simple mathematical game that challenges concentration and calculation speed

------ What is it ------

7Boom (or 7 Boom) is a game that puts to the test logic, mathematical and concentration skills.

It is an ideal pastime for challenging friends and a great exercise to train the mind.

------ How to play ------

The goal is to reach the number 61 within two minutes.

On the screen there are two button ("Next" and "BOOM!") and a number that starts from 1.

You have to press the button "BOOM!" every time that the displayed number:

- contains the number 7

- is a multiple of 7

- is composed by digits that summed or subtracted are equal to 7

In all other cases "Next" is the right answer.

But beware!! If you select the wrong button, the counter is halved.

There are three levels: beginner, expert and genius.

Depending on the selected level, the number to reach is higher.

------ Version ------

This is the free version of the game, it is possible to play with number 7.

With the full version it is possible to play with all number from 3 to 9.

Any comment or advice is welcome :)

Good Luck!

Gighen