Question

Делиться ли числа 600,81,3 330,405,9 033,9 339,75 870, 2 763, 480, 1 536, 12 521, 7 587, на:1) 9; 2) 3;

Answer 1

Все числа делятся на 3. вариант ответа 2

Answer 2

To check if the numbers are divisible by 9 and 3, we can use the divisibility rules for these numbers.

1. Divisibility by 9: A number is divisible by 9 if the sum of its digits is divisible by 9.

2. Divisibility by 3: A number is divisible by 3 if the sum of its digits is divisible by 3.

Let's apply these rules to each number:

1. 600: Sum of digits: 6 + 0 + 0 = 6 Divisible by 9: No (sum of digits is not divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

2. 81: Sum of digits: 8 + 1 = 9 Divisible by 9: Yes (sum of digits is divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

3. 330: Sum of digits: 3 + 3 + 0 = 6 Divisible by 9: No (sum of digits is not divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

4. 405: Sum of digits: 4 + 0 + 5 = 9 Divisible by 9: Yes (sum of digits is divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

5. 9033: Sum of digits: 9 + 0 + 3 + 3 = 15 Divisible by 9: No (sum of digits is not divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

6. 9339: Sum of digits: 9 + 3 + 3 + 9 = 24 Divisible by 9: No (sum of digits is not divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

7. 75870: Sum of digits: 7 + 5 + 8 + 7 + 0 = 27 Divisible by 9: Yes (sum of digits is divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

8. 2763: Sum of digits: 2 + 7 + 6 + 3 = 18 Divisible by 9: Yes (sum of digits is divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

9. 480: Sum of digits: 4 + 8 + 0 = 12 Divisible by 9: Yes (sum of digits is divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

10. 1536: Sum of digits: 1 + 5 + 3 + 6 = 15 Divisible by 9: No (sum of digits is not divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

11. 12521: Sum of digits: 1 + 2 + 5 + 2 + 1 = 11 Divisible by 9: No (sum of digits is not divisible by 9) Divisible by 3: No (sum of digits is not divisible by 3)

12. 7587: Sum of digits: 7 + 5 + 8 + 7 = 27 Divisible by 9: Yes (sum of digits is divisible by 9) Divisible by 3: Yes (sum of digits is divisible by 3)

In summary:

1. Divisible by 9: 81, 405, 75870, 2763, 480, 7587
2. Divisible by 3: All numbers in the list