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Question
Find the prime factorisation number by factor tree method and division method.
144
Solution
144
∴ 144 = 2 × 2 × 2 × 2 × 3 × 3
Also
2 | 144 |
2 | 72 |
2 | 36 |
2 | 18 |
3 | 9 |
3 | 3 |
1 |
144 = 2 × 72 = 2 × 2 × 36
= 2 × 2 × 2 × 18 = 2 × 2 × 2 × 2 × 9
= 2 × 2 × 2 × 2 × 3 × 3
∴ 144 = 2 × 2 × 2 × 2 × 3 × 3
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