Unit 8 Lesson 4: Exercise 1.

Find the Highest Common Factors of each of the following sets of numbers. Using any of the methods shown in the examples.

  1. 18 and 30
  2. 39 and 52
  3. 45 and 70
  4. 15 and 24
  5. 42 and 70
  6. 54 and 90
  7. 40 and 56
  8. 36 and 54
  9. 63 and 84
  10. 60 and 75
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