Joelle bought some stickers. She gave
14 of the stickers to her sister and sold
25 of the remaining stickers. After that, she bought another 66 stickers and had the same number of stickers that she bought at first. How many stickers did Joelle buy at first?
| Her sister |
Remaining stickers |
Bought stickers |
Total |
1x5 =
5 u |
3x5 =
15 u |
|
4x5 =
20 u |
| |
Sold |
Left |
|
|
| |
2x3 |
3x3 |
|
|
| 5 u |
6 u |
9 u |
66 |
|
The remaining number of stickers before Joelle bought another 66 stickers is repeated. Make the remaining number of stickers the same. LCM of 3 and 5 is 15.
Total number of stickers at first = 20 u
Number of stickers that Joelle had left and bought after that = 9 u + 66
20 u = 9 u + 66
20 u - 9 u = 66
11 u = 66
1 u = 66 ÷ 11 = 6
Total number of stickers at first
= 20 u
= 20 x 6
= 120
Answer(s): 120
