Math Olympiad 1

MathToSuccess

Where Practice Brings Success

Digits & Digit sum( Week 47 Evaluation)

1. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3. Which two-digit number has the smallest digit sum?

2. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.

61, 62, 63, 64, and 65

Which of the above two-digit numbers has the largest digit sum?
What is the largest digit sum?

3. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.

87, 88, 89, 90, 91, 92, 93, and 94

Which of the above two-digit numbers has the smallest digit sum?
What is the smallest digit sum?

4. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.

68, 69, 70, 71, 72, and 73

Which of the above two-digit numbers has the smallest digit sum?
What is the smallest digit sum?

5. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.

28, 29, 30, 31, 32, 33, 34, 35, and 36

Which of the above two-digit numbers has the largest digit sum?
What is the largest digit sum?

6. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.

58, 59, 60, 61, 62, and 63

Which of the above two-digit numbers has the smallest digit sum?
What is the smallest digit sum?

7. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.

39, 40, 41, 42, 43, and 44

Which of the above two-digit numbers has the smallest digit sum?
What is the smallest digit sum?

8. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.

17, 18, 19, 20, and 21

Which of the above two-digit numbers has the smallest digit sum?
What is the smallest digit sum?

9. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.
How many two-digit numbers are there with digit-sum equal to 15?
What are those numbers?

10. The digit sum of a given number is the sum of all its digits. For example, the digit sum of 12 is 1 + 2 = 3.
How many two-digit numbers are there with digit-sum equal to 9?
What are those numbers?

By click the below Submit button, answers are finalized.

Northern Virginia GT Test Dates

New York City GT Info