A drink stall had 42 small and big bottles of tea. The number of small bottles is
25 of the number of big bottles. After selling a few big bottles of tea, there are
12 as many small bottles as big bottles left. How many big bottles of tea were sold?
| |
Small bottles |
Big bottles |
Total |
| Before |
2 u |
5 u |
7 u |
| Change |
|
- 1 u |
|
| After |
1x2 =
2 u |
2x2 =
4 u |
|
The number of small bottles remains unchanged. Make the number of small bottles the same. LCM of 2 and 1 is 2.
Number of small bottles at first = 2 u
Number of big bottles at first = 5 u
Total number of bottles at first
= 2 u + 5 u
= 7 u
7 u = 42
1 u = 42 ÷ 7 = 6
Number of big bottles sold
= 5 u - 4 u
= 1 u
= 6
Answer(s): 6
