Abi spent
25 of her money on 10 pens and 2 pencils. The cost of one pencil was thrice the cost of one pen. She bought some more pencils with
14 of her remaining money. How many pencils did Abi buy altogether?
10 pens and
2 pencils |
Remaining amount |
| 2x4 |
3x4 |
| |
More pencils |
Left |
| |
1x3 |
3x3 |
| 8 p |
3 p |
9 p |
Cost of 1 pen = 1 u
Cost of 1 pencil = 3 u
Cost of 10 pens = 10 x 1 u = 10 u
Cost of 2 pencils = 2 x 3 u = 6 u
Total cost of 10 pens and 2 pencils
= 10 u + 6 u
= 16 u
8 p = 16 u
1 p = 16 ÷ 8 = 2 u
Amount that Abi used to buy more pencils
= 3 p
= 3 x 2 u
= 6 u
Number of more pencils that Abi bought
= 6 u ÷ 3 u
= 2
Total number of pencils that Abi bought
= 2 + 2
= 4
Answer(s): 4
