6. What is the highest common factor of 45 and 36?
- 9
- 18
- 3
- 5
7. What is 12 + 7 x 3?
- 26
- 33
- 45
- 57
8. what is 7.2 / 0.4?
- 12
- 18
- 1.8
- 1.2
9. Round 455,782 to 2 significant figures.
- 456,000
- 460,000
- 450,000
- 455,000
10. What is the lowest common multiple of 9 and 12?
- 3
- 36
- 108
- 54
