Klepitsyn V.A.

Vasya multiplied a certain number by 10 and got a prime number. And Petya multiplied the same number by 15, but still got a prime number.

Could it be that neither of them made a mistake?
$0.2 \cdot 10 = 2$ and $0.2 \cdot 15 = 3$ - prime numbers.

## Answer

Maybe.