Hilda spent
25 of her money on 8 markers and 4 files. The cost of one file was twice the cost of one marker. She bought some more files with
16 of her remaining money. How many files did Hilda buy altogether?
8 markers and
4 files |
Remaining amount |
| 2x2 |
3x2 |
| |
More files |
Left |
| |
1x1 |
5x1 |
| 4 p |
1 p |
5 p |
Cost of 1 marker = 1 u
Cost of 1 file = 2 u
Cost of 8 markers = 8 x 1 u = 8 u
Cost of 4 files = 4 x 2 u = 8 u
Total cost of 8 markers and 4 files
= 8 u + 8 u
= 16 u
4 p = 16 u
1 p = 16 ÷ 4 = 4 u
Amount that Hilda used to buy more files
= 1 p
= 1 x 4 u
= 4 u
Number of more files that Hilda bought
= 4 u ÷ 2 u
= 2
Total number of files that Hilda bought
= 4 + 2
= 6
Answer(s): 6
