The Brain Games is a set of five console games built on the principle of popular mobile applications for brain pumping. Each game asks questions that need to be answered correctly. After three correct answers, it is considered that the game is over. Incorrect answers end the game and offer to go through it again. Games:

• Calculator. Arithmetic expressions that need to be calculated.
• Progression. Search for missing numbers in a sequence of numbers.
• Definition of an even number.
• Determination of the greatest common divisor.
• Definition of a prime number.

The essence of the game:

A random number is shown to the user. He needs to answer yes if the number is even, or no if it is odd.

The essence of the game:

The user is shown a random mathematical expression, for example 35 + 16, which needs to be calculated and written down the correct answer.

The essence of the game:

The user is shown two random numbers, for example, 25 50. The user must calculate and enter the greatest common divisor of these numbers.

We show the player a series of numbers forming an arithmetic progression by replacing any of the numbers with two dots. The player must determine this number.

Is it a prime number? Answer yes or no.