2. Find Factors of 21 by Multiplication method
Solution:
In Multiplication method, If we can express 21 as the product of two numbers, then the numbers being multiplied are factors of 21
| 1 | `xx` | 21 | = | 21 |
| 3 | `xx` | 7 | = | 21 |
| 7 | `xx` | 3 | = | 21 |
Since 7 and 3 are already factors of 21, so we stop here
So, factors of 21 are
`1,3,7,21`
This material is intended as a summary. Use your textbook for detail explanation.
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