In a shop, some frisbees and toy cars were on sale.
15 of the items were frisbees.
13 of the frisbees and 115 toy cars were sold. There were
16 of the items left in the shop. How many frisbees and toy cars were there in the shop at first?
| |
Frisbees |
Toy cars |
Total |
Comparing frisbees
and toy cars at first |
1x6 =
6 u |
4x6 =
24 u |
5x6 =
30 u |
| Before |
3x2 =
6 u |
|
6x5 =
30 u |
| Change |
- 1x2 =
- 2 u |
- 115
|
- 5x5 =
- 25 u |
| After |
2x2 =
4 u |
1 u |
1x5 =
5 u |
The total number of toys at first is repeated. Make the total number of toys at first the same. LCM of 5 and 6 is 30.
The number of frisbees at first is repeated. Make the number of frisbees the same. LCM of 6 and 3 is 6.
Number of toy cars left
= 5 u - 4 u
= 1 u
Number of toy cars sold
= 24 u - 1 u
= 23 u
23 u = 115
1 u = 115 ÷ 23 = 5
Number of frisbees and toy cars at first
= 30 u
= 30 x 5
= 150
Answer(s): 150
