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Question
Find the prime factorisation number by factor tree method and division method.
128
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Solution
128
∴ 128 = 2 × 2 × 2 × 2 × 2 × 2 × 2
Also
| 2 | 128 |
| 2 | 64 |
| 2 | 32 |
| 2 | 16 |
| 2 | 8 |
| 2 | 4 |
| 2 | 2 |
| 1 |
128 = 2 × 64 = 2 × 2 × 32
= 2 × 2 × 2 × 16
= 2 × 2 × 2 × 2 × 8
128 = 2 × 2 × 2 × 2 × 2 × 4
∴ 128 = 2 × 2 × 2 × 2 × 2 × 2 × 2
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