Barbara spent
27 of her money on 4 files and 5 markers. The cost of one marker was four times the cost of one file. She bought some more markers with
13 of her remaining money. How many markers did Barbara buy altogether?
4 files and
5 markers |
Remaining amount |
| 2x3 |
5x3 |
| |
More markers |
Left |
| |
1x5 |
2x5 |
| 6 p |
5 p |
10 p |
Cost of 1 file = 1 u
Cost of 1 marker = 4 u
Cost of 4 files = 4 x 1 u = 4 u
Cost of 5 markers = 5 x 4 u = 20 u
Total cost of 4 files and 5 markers
= 4 u + 20 u
= 24 u
6 p = 24 u
1 p = 24 ÷ 6 = 4 u
Amount that Barbara used to buy more markers
= 5 p
= 5 x 4 u
= 20 u
Number of more markers that Barbara bought
= 20 u ÷ 4 u
= 5
Total number of markers that Barbara bought
= 5 + 5
= 10
Answer(s): 10
