Gabby spent
25 of her money on 3 folders and 9 foolscaps. The cost of one foolscap was thrice the cost of one folder. She bought some more foolscaps with
15 of her remaining money. How many foolscaps did Gabby buy altogether?
3 folders and
9 foolscaps |
Remaining amount |
| 2x5 |
3x5 |
| |
More foolscaps |
Left |
| |
1x3 |
4x3 |
| 10 p |
3 p |
12 p |
Cost of 1 folder = 1 u
Cost of 1 foolscap = 3 u
Cost of 3 folders = 3 x 1 u = 3 u
Cost of 9 foolscaps = 9 x 3 u = 27 u
Total cost of 3 folders and 9 foolscaps
= 3 u + 27 u
= 30 u
10 p = 30 u
1 p = 30 ÷ 10 = 3 u
Amount that Gabby used to buy more foolscaps
= 3 p
= 3 x 3 u
= 9 u
Number of more foolscaps that Gabby bought
= 9 u ÷ 3 u
= 3
Total number of foolscaps that Gabby bought
= 9 + 3
= 12
Answer(s): 12
