Risa spent
27 of her money on 3 staplers and 5 foolscaps. The cost of one foolscap was thrice the cost of one stapler. She bought some more foolscaps with
13 of her remaining money. How many foolscaps did Risa buy altogether?
3 staplers and
5 foolscaps |
Remaining amount |
| 2x3 |
5x3 |
| |
More foolscaps |
Left |
| |
1x5 |
2x5 |
| 6 p |
5 p |
10 p |
Cost of 1 stapler = 1 u
Cost of 1 foolscap = 3 u
Cost of 3 staplers = 3 x 1 u = 3 u
Cost of 5 foolscaps = 5 x 3 u = 15 u
Total cost of 3 staplers and 5 foolscaps
= 3 u + 15 u
= 18 u
6 p = 18 u
1 p = 18 ÷ 6 = 3 u
Amount that Risa used to buy more foolscaps
= 5 p
= 5 x 3 u
= 15 u
Number of more foolscaps that Risa bought
= 15 u ÷ 3 u
= 5
Total number of foolscaps that Risa bought
= 5 + 5
= 10
Answer(s): 10
