Find the common factors of:
(a) 4, 8 and 12 (b) 5, 15 and 25
(a)
Factors of 4 are 1, 2 and 4.
Factors of 8 are 1, 2, 4 and 8.
Factors of 12 are 1, 2, 3, 4, 6 and 12.
Therefore, common factors of 4, 8 and 12 are 1, 2 and 4.
(b)
Factors of 5 are 1 and 5.
Factors of 15 are 1, 3, 5 and 15.
Factors of 25 are 1, 5 and 25.
Therefore, common factors of 5, 15 and 25 are 1 and 5.
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