Question

Какие цифры можно поставить вместо квадратов чтобы число 823кв делилось на 5 но не на 3

Answer 1

Признак делимости на 5 делятся числа которые заканчиваются. на 5 и 0.
на 3 делится число, если сумма его цифр делится на 3.
посмотрим данное число: 8+2+3=13 если допишем к числу 5 чтобы оно делилось на 5, то получим число которое делится и на 3: 8+2+3+5=18.
значит пишем 0;
тогда полученное число 8230 делится на 5, но не делится на 3.

Answer 2

4 потставь и все и сапишы

Answer 3

Finding the Number to Replace the Square

To find the number that can be placed in the square to make the number 823X divisible by 5 but not by 3, we can use the following approach:

1. Divisibility by 5: A number is divisible by 5 if its units digit is 0 or 5. 2. Divisibility by 3: A number is divisible by 3 if the sum of its digits is divisible by 3.

Let's consider the number 823X. We need to find the value of X that makes the number divisible by 5 but not by 3.

Solution

1. Divisibility by 5: To make 823X divisible by 5, X must be 0 or 5. 2. Divisibility by 3: To ensure 823X is not divisible by 3, we need to check the sum of its digits.

- If X = 0: 8230 is not divisible by 3 (8 + 2 + 3 + 0 = 13, which is not divisible by 3). - If X = 5: 8235 is not divisible by 3 (8 + 2 + 3 + 5 = 18, which is divisible by 3).

Conclusion

The number that can be placed in the square to make the number 823X divisible by 5 but not by 3 is 0.

This conclusion is based on the rules of divisibility by 5 and 3, as outlined above