How to find HCF using factorisation method.
a) 88 = 2 × 2×2×11
40 = 2 × 2×2× 5
1) 6
2) 8
3) 10
4) 30
b) 48 = 2×2×2×2×3
36 = 2×2×3×3
1) 14
2) 18
3) 12
4) 7
c) 168 = 2×2×2×3×7
126 = 2×3×3×7
1) 42
2) 23
3) 26
4) 30
d) 75 = 3 ×5×5
100 = 2×2×5×5
1) 10
2) 15
3) 25
4) 30
e) 45 = 3 × 3×5
81 = 3×3×3×3
1) 6
2) 9
3) 15
4) 30
How to find LCM using factorisation method.
a) 88 = 2 × 2×2×11
40 = 2 × 2×2× 5
1) 110
2) 220
3) 330
4) 440
b) 48 = 2×2×2×2×3
36 = 2×2×3×3
1) 144
2) 48
3) 96
4) 108
c) 168 = 2×2×2×21
126 = 2×3×21
1) 168
2) 504
3) 546
4) 378
d) 75 = 3 ×5×5
100 = 2×2×5×5
1) 120
2) 300
3) 30
4) 7500
e) 45 = 3 × 3×5
81 = 3×3×3×3
1) 60
2) 90
3) 450
4) 405