2.2.2 Factors and Multiples, PT3 Practice


Question 5:
State all the prime factors of 156.

Solution:
Factors of 156: 1 × 156 2  × 78 3  × 52 × 39 × 26 12 ×  13 2, 3 and 13 are the prime factors of 156.


Question 6:
State all the prime factors of 182.

Solution:
Factors of 182: 1 × 182 2  × 91 7  × 26 13  × 14 2, 7, 13 and 91 are the prime factors of 182.


Question 7:
State the first two common multiples of 3, 5 and 6.

Solution:
Multiples of 3 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, …
Multiples of 5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, …
Multiples of 6 = 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, …

The first two common multiples of 3, 5 and 6 are 30 and 60.


Question 8:
Find the lowest common multiple (LCM) of 4, 8 and 24.

Solution:



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