Question

Match the pair of numbers with their HCF.

• A. 9
• B. 1
• C. 4

Answer 1

$\left(i\right)$ Factors of 8:
1 × 8
2 × 4
Factors of 12:
1 × 12
2 × 6
3 × 4
$\therefore$ HCF = 4

$\left(ii\right)$ Factors of 9:
1 × 9
3 × 3
Factors of 63:
1 × 63
3 × 21
7× 9
$\therefore$ HCF = 9

$\left(iii\right)$ Factors of 5:
1 × 5
Factors of 11;
1 ×11

$\therefore$ HCF = 1