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Ten balls labelled $1, 2, 3, ..., 10$ are put into an urn and thoroughly mixed. Then, one by one, each ball is taken from the urn at random and …

You are given a $4 \times 4$ square Board and you need to fill it with Red and Blue colours, Such that there are exactly two blue boxes and two …

Imagine you are a Galvanian creature in the exoplanet of Galvan. This planet is known for its frequent quakes and how they have terrified the Galvanian civilization for millions of …

In the picture bellow: the bear want to go to the cell containing the honey jar, each time he move he go either to the up-left cell or up-right cell. …

Perpetua is a machine that generates numbers between 1 to 10 that can only consist of the digits 4 and 6 every time the machine is made to run. The …

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