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Hello! It seems you want to check your solution for one of our puzzles. We review all the solutions on the website by hand and will gladly review yours!

But first, it is important for us to make sure that you are not a robot :)

Please take a test from Megamind by solving 3 problems — these problems are easier those that are published on the website. All answers are numerical.

5 blue and 7 white balls are in a box. Megamind pulls out 2 balls from the box. What is the probability that both balls are blue?

Name the following member of the sequence: 0 1 3 6 10 15 21 ...

How many different natural divisors does the number 90 have?

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You need to solve 3 puzzles from 3, and then to chose login, password, provide e-mail