Math Olympiad 3

Divisibility Problems (1)( Week 23 Evaluation)

1. Is 397 divisible by 2?

Yes No

2. Is the result of 11 + 2 + 5 − 8 − 3 − 1 + 1 an even number?

Yes No

3. Determine which of the following number(s) are divisible by 10. Type the number(s) in the blank, and separate each number with a comma if necessary.

339

6240

12791

500513

2354345

4. When 270 is divided by a certain number, the answer is 18. What is the number?

5. What is the smallest 3-digit number that is a multiple of 4?
What is the largest 3-digit number that is a multiple of 4?
What is the 3-digit number that is a multiple of 4 with the smallest digit sum?
What is the 3-digit number that is a multiple of 4 with the largest digit sum?

6. Type all the multiples of 5 between 900 and 999, and their digits sums are also multiples of 5. Separate two numbers with a comma.

7. Is 85 divisible by 4?

Yes No

8. Type all the multiples of 6 between 400 and 499, and their digits sum also are multiples of 6. Separate two numbers with a comma.

9. Type all the multiples of 10 between 500 and 699, and their digits sums are also multiples of 10. Separate two numbers with a comma.

10. Determine which of the following number(s) are divisible by 6. Type the number(s) in the blank, and separate each number with a comma if necessary.

643

5395

55311

237266

2284909

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