1. find the average of first 12 multiple of 12
Solution:
First 12 Multiples of 12
| 12 | `xx` | 1 | = | 12 |
| 12 | `xx` | 2 | = | 24 |
| 12 | `xx` | 3 | = | 36 |
| 12 | `xx` | 4 | = | 48 |
| 12 | `xx` | 5 | = | 60 |
| 12 | `xx` | 6 | = | 72 |
| 12 | `xx` | 7 | = | 84 |
| 12 | `xx` | 8 | = | 96 |
| 12 | `xx` | 9 | = | 108 |
| 12 | `xx` | 10 | = | 120 |
| 12 | `xx` | 11 | = | 132 |
| 12 | `xx` | 12 | = | 144 |
Multiples of 12 are `12,24,36,48,60,72,84,96,108,120,132,144`
Adding the multiples, the Sum is `936`
Average `=936/12=78`
2. find the average of first 8 multiples of 3
Solution:
First 8 Multiples of 3
| 3 | `xx` | 1 | = | 3 |
| 3 | `xx` | 2 | = | 6 |
| 3 | `xx` | 3 | = | 9 |
| 3 | `xx` | 4 | = | 12 |
| 3 | `xx` | 5 | = | 15 |
| 3 | `xx` | 6 | = | 18 |
| 3 | `xx` | 7 | = | 21 |
| 3 | `xx` | 8 | = | 24 |
Multiples of 3 are `3,6,9,12,15,18,21,24`
Adding the multiples, the Sum is `108`
Average `=108/8=13`
This material is intended as a summary. Use your textbook for detail explanation.
Any bug, improvement, feedback then
