In a kiosk, some toy rifles and toy planes were on sale.
14 of the items were toy rifles.
23 of the toy rifles and 104 toy planes were sold. There were
19 of the items left in the kiosk. How many toy rifles and toy planes were there in the kiosk at first?
| |
Toy rifles |
Toy planes |
Total |
Comparing toy rifles
and toy planes at first |
1x9 =
9 u |
3x9 =
27 u |
4x9 =
36 u |
| Before |
3x3 =
9 u |
|
9x4 =
36 u |
| Change |
- 2x3 =
- 6 u |
- 104
|
- 8x4 =
- 32 u |
| After |
1x3 =
3 u |
1 u |
1x4 =
4 u |
The total number of toys at first is repeated. Make the total number of toys at first the same. LCM of 4 and 9 is 36.
The number of toy rifles at first is repeated. Make the number of toy rifles the same. LCM of 9 and 3 is 9.
Number of toy planes left
= 4 u - 3 u
= 1 u
Number of toy planes sold
= 27 u - 1 u
= 26 u
26 u = 104
1 u = 104 ÷ 26 = 4
Number of toy rifles and toy planes at first
= 36 u
= 36 x 4
= 144
Answer(s): 144
