In a kiosk, some toy planes and dolls were on sale.
15 of the items were toy planes.
23 of the toy planes and 189 dolls were sold. There were
16 of the items left in the kiosk. How many toy planes and dolls were there in the kiosk at first?
| |
Toy planes |
Dolls |
Total |
Comparing toy planes
and dolls at first |
1x6 =
6 u |
4x6 =
24 u |
5x6 =
30 u |
| Before |
3x2 =
6 u |
|
6x5 =
30 u |
| Change |
- 2x2 =
- 4 u |
- 189
|
- 5x5 =
- 25 u |
| After |
1x2 =
2 u |
3 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 toy planes at first is repeated. Make the number of toy planes the same. LCM of 6 and 3 is 6.
Number of dolls left
= 5 u - 2 u
= 3 u
Number of dolls sold
= 24 u - 3 u
= 21 u
21 u = 189
1 u = 189 ÷ 21 = 9
Number of toy planes and dolls at first
= 30 u
= 30 x 9
= 270
Answer(s): 270
