2. Find Factors of 21 by Division method
Solution:
In Division method, 21 is divided by different integers. If the integers divide 21 exactly and leave the remainder 0, then those integers are considered as the factors of 21.
| 21 | `-:` | 1 | = | 21 |
| 21 | `-:` | 3 | = | 7 |
| 21 | `-:` | 7 | = | 3 |
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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