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Question
Find the prime factorisation number by factor tree method and division method.
198
Solution
198
∴ 198 = 2 × 3 × 3 × 11
Also
| 2 | 198 |
| 3 | 99 |
| 3 | 33 |
| 11 | 11 |
| 1 |
198 = 2 × 99
= 2 × 3 × 33
= 2 × 3 × 3 × 11
∴ 198 = 2 × 3 × 3 × 11
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