Mary bought some stickers. She gave
14 of the stickers to her brother and sold
25 of the remaining stickers. After that, she bought another 88 stickers and had the same number of stickers that she bought at first. How many stickers did Mary buy at first?
| Her brother |
Remaining stickers |
Bought stickers |
Total |
1x5 =
5 u |
3x5 =
15 u |
|
4x5 =
20 u |
| |
Sold |
Left |
|
|
| |
2x3 |
3x3 |
|
|
| 5 u |
6 u |
9 u |
88 |
|
The remaining number of stickers before Mary bought another 88 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 Mary had left and bought after that = 9 u + 88
20 u = 9 u + 88
20 u - 9 u = 88
11 u = 88
1 u = 88 ÷ 11 = 8
Total number of stickers at first
= 20 u
= 20 x 8
= 160
Answer(s): 160
