Verified answer

SOLUTION

1. 21 and 42

7 | 21 and 42

3 and 6

• G C F = 7

2. 15 and 60

5 | 15 and 60

3 | 3 and 12

1 and 4

• G C F = 5×3 = 15

3. 12 , 16 and 32

2 | 12 , 16 and 32

2 | 6 , 8 and 16

3 , 4 and 8

• G C F = 2×2 = 4

4. 16 , 48 and 72

2 | 16 , 48 and 72

2 | 8 , 24 and 36

2 | 4 , 12 and 18

2 | 2 , 6 and 9

• G C F = 2×2×2×2 = 16

5. 6 , 12 and 24

2 | 6 , 12 and 24

3 | 3 , 6 and 12

1 , 2 and 4

• G C F = 2×3 = 6

ANSWER

1. G C F = 7
2. G C F = 15
3. G C F = 4
4. G C F = 16
5. G C F = 6