Move 3 matches to reverse the direction of the arrow.

Numbers from 1 to 10 are arranged in a row.

1   2   3   4   5   6   7   8   9   10 = 0

Is it possible to place '+' and '–' signs between them in such a way that the value of the resulting expression equals zero?

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The number ends in 2.

If this digit is moved to the beginning of the number, it will double.

Find the smallest number that satisfies these conditions.

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How many logs were there if fifty two cuts resulted in 72 logs?

A horse eats a haystack in 2 days, a cow in 3 days, a sheep in 6 days. How long will it take a horse, a cow and a sheep to eat a haystack together?

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There are three milk cans with capacities of 3 litres, 5 litres, and 8 litres. The largest can contains 8 litres of milk, and the rest of the cans are empty. How do you use these cans to split the milk in half?

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Is it possible to move exactly one matchstick to make a square? 

Which number is 7 times more than its last digit?

Solve this equation: T – W – O = T ÷ W ÷ O = 2 (different letters are different numbers).

The father is 32 years old, the son is 5 years old. In how many years will the father be 10 times older than his son?