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Question
The HCF of 120 and 150 is ______.
Options
30
45
20
120
Solution
The HCF of 120 and 150 is 30.
Explanation:
| 2 | 120 |
| 2 | 60 |
| 2 | 30 |
| 3 | 15 |
| 5 | 5 |
| 1 |
| 2 | 150 |
| 3 | 75 |
| 5 | 25 |
| 5 | 5 |
| 1 |
120 = 2 × 2 × 2 × 3 × 5
150 = 2 × 3 × 5 × 5
HCF = 2 × 3 × 5 = 30
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