Fomin C.B.

Kolya and Vasya received 20 grades each in January, and Kolya received as many fives as Vasya received fours, as many fours as Vasya received threes, as many threes as Vasya received twos, and as many twos as Vasya received fives. Moreover, their average grade for January is the same. How many twos did Kolya receive in January?
Let's add one point to each of Vasya's grades. His total score will increase by 20. On the other hand, it will become greater than Kolya's total score by a quadrupled number of Kolya's twos.

## Answer

5 twos.