Challenge Questions

Solve the following problems on another sheet of paper.

1. Mrs. Patel goes to the supermarket. She wants to buy 10 kg of sugar. However, the sugar is sold in 1-kg, 2-kg, and 5-kg bags. List 5 ways that she can buy 10 kg of sugar.

1 kg 2 kg 5 kg

2. X is a 2-digit number. The sum of all its digits is 9. The first digit is 3 more than the second digit. What is X?

3. Rico keeps some birds and cats as pets. The total number of legs his animals have is 22. The number of cats is 1 more than the number of birds. How many cats and birds does he have?

4. Clock A chimes every 2 minutes. Clock B chimes every 5 minutes. If the 2 clocks are timed together, how many times will they chime in 10 minutes?

5. Jess has 3 bills of different values. The total value of these bills is $35. What bills does she have?

6. Brianna has 2 watches that are not working well. Watch A is 4 hours fast. Watch B is 8 hours slow. What is the actual time in the morning when both watches show 12:00?

+ + + = 20

What is the value of ?

8. Kenji flipped to a page in his math workbook. The sum of the facing pages was 61. Which 2 pages was Kenji looking at?

9. I am a 2-digit number. When the first digit is subtracted from the second digit, the result is 7. The first digit is an even number, and the second digit is an odd number. What number am I?

10. Nicky watched a cartoon in the afternoon. It lasted an hour. 5 hours after the cartoon, he went to bed at 9 o’clock. What time did the cartoon start?

11. Elian’s mother gave him 2 coins. The sum of the coins was less than a dollar. What was the greatest amount of money that Elian could receive from his mother?