A drink stall had 65 big and small bottles of green tea. The number of big bottles is
310 of the number of small bottles. After selling a few small bottles of green tea, there are
13 as many big bottles as small bottles left. How many small bottles of green tea were sold?
| |
Big bottles |
Small bottles |
Total |
| Before |
3 u |
10 u |
13 u |
| Change |
|
- 1 u |
|
| After |
1x3 =
3 u |
3x3 =
9 u |
|
The number of big bottles remains unchanged. Make the number of big bottles the same. LCM of 3 and 1 is 3.
Number of big bottles at first = 3 u
Number of small bottles at first = 10 u
Total number of bottles at first
= 3 u + 10 u
= 13 u
13 u = 65
1 u = 65 ÷ 13 = 5
Number of small bottles sold
= 10 u - 9 u
= 1 u
= 5
Answer(s): 5
