Question

0.20: Find the common factors of: (a) 4, 8 and 12 (b) 5, 15 and 25
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Answer 1

Step-by-step explanation:

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Answer 2

Common Factor

Step-by-step explanation:

Common factor is the factor that is common in all the given numbers.

The common factors of:

(a) 4, 8 and 12

• Factors of 4 = 1 × 2 × 2
• Factors of 8 = 1 × 2 × 2 × 2
• Factors of 12 = 1 × 2 × 2 × 3
• So the factors that are common in 4, 8 and 12 are 1, 2 and 4.

1 × 2 × 2 = 4

The highest common factor for 4, 8 and 12 is 4 .

(b) 5, 15 and 25

• Factors of 5 = 1 × 5
• Factors of 15 = 1 × 3 × 5
• Factors of 25 = 1 × 5 × 5
• So the factors that are common in 5, 15 and 25 are 1 and 5.

1 × 5 = 5

The highest common factor of 5, 15 and 25 is 5 .