1. Math Lab Number Theory Chapter 4

2. Question 1 Roger has 126 pieces of candy. He has 3 friends. Can he divide the candy evenly between his friends?

3. Question 2 Bert has 40 pencils. He divides him in to 2 piles. Are there any leftover pencils? What about 3 piles? What about 5 piles? What about 6 piles? What about 10 piles? Divisibility Rules 2: Ends in 0,2,4,6,8 3: Add digits  divisible by 3 5: Ends in 0,5 6: Yes for both 2 and 3 9: Add digits  divisible by 9 10: Ends in 0

4. Question 3 Create a factor tree for 40:

5. Question 4 Write 30 as 3 prime numbers multiplied together: 30 = _____ x _____ x _____

6. Question 5 Find the LCM of 15 and 20: LCM: The smallest number that two numbers have as a common multiple. 6: 6, 12, 18, 24 4: 4, 8, 12, 16, 20, 24

7. Question 6 Find the GCF of 15 and 20. GCF: The largest number that will divide both numbers in a pair. 15: 1, 3, 5, 15 20: 1, 2, 4, 5, 10, 20

8. Question 7 Three miles is 16,000 ft. Re-write this in scientific notation. ______ x 10 ___

9. Question 8 Re-write 4.5 x 10 6 as a normal number:

10. Question 9 Find the next three numbers in this sequence: 4, 8, 12, 16, 20, ___, ___, ___ What is the rule?

11. Question 10 Find the next three numbers in this sequence: 1, 2, 4, 8, 16, ___, ___, ___ What is the rule?