6. How many four-digit numbers written with the digits $0,1,2,4$ and 5 are divisible by 5, and how many are not divisible by 5? Which are more and by how many?
6. Four-digit numbers are of the form $\overline{a b c d}$. 1 point.

The digits of a four-digit number divisible by 5 can be:

$a \in\{1,2,4,5\}$,

$b \in\{0,1,2,4,5\}$,

$c \in\{0,1,2,4,5\}$,

$d \in\{0,5\}$.

There are $4 \cdot 5 \cdot 5 \cdot 2=200$ such numbers.

4 points

The digits of a four-digit number not divisible by 5 can be:

$a \in\{1,2,4,5\}$,

$b \in\{0,1,2,4,5\}$,

$c \in\{0,1,2,4,5\}$,

$d \in\{1,2,4\}$.

There are $4 \cdot 5 \cdot 5 \cdot 3=300$ such numbers.

4 points

There are more four-digit numbers that are not divisible by 5, and the difference is 100. 1 point TOTAL 10 POINTS