Min used
37 of her blue stickers and
25 of her pink stickers to decorate her diary. In the end, she had an equal number of blue stickers and pink stickers left. Given that Min had a total of 369 blue and pink stickers at first, how many pink stickers did she use to decorate the diary?
|
Blue stickers |
Pink stickers |
Before |
7x3 = 21 u |
5x4 = 20 u |
Change |
- 3x3 = - 9 u |
- 2x4 = - 8 u |
After |
4x3 = 12 u |
3x4 = 12 u |
The number of blue stickers and pink stickers in the end is the same. Make the number of blue stickers and pink stickers in the end the same. LCM of 4 and 3 is 12.
Total number of stickers that Min used to decorate the diary
= 21 u + 20 u
= 41 u
41 u = 369
1 u = 369 ÷ 41 = 9
Number of pink stickers that Min used to decorate the diary
= 8 u
= 8 x 9
= 72
Answer(s): 72