## Answers

**Hcf of 42 , 63 and 1403**

**Factors of 42 63 140 that add up to numbers**

Factors of 42 63 140 that add up to 96

=1 + 2 + 3 + 6 + 7 + 14 + 21 + 42

Factors of 42 63 140 that add up to 3

= 1 + 2

Factors of 42 63 140 that add up to 6

= 1 + 2 + 3

Factors of 42 63 140 that add up to 12

= 1 + 2 + 3 + 6

**Factor of 42 63 140 in pairs**

⇒

**1 x 42**

⇒

**2 x 21**

⇒

**3 x 14**

⇒

**6 x 7**

⇒

**7 x 6**

1 and 42 are a factor pair of 42 63 140 since

1 x 42= 42

2 and 21 are a factor pair of 42 63 140 since

2 x 21= 42

3 and 14 are a factor pair of 42 63 140 since

3 x 14= 42

6 and 7 are a factor pair of 42 63 140 since

6 x 7= 42

7 and 6 are a factor pair of 42 63 140 since

7 x 6= 42

**Factors =1, 2, 3, 6, 7, 14, 21, 42**