Min used
25 of her pink stickers and
37 of her red stickers to decorate her diary. In the end, she had an equal number of pink stickers and red stickers left. Given that Min had a total of 246 pink and red stickers at first, how many red stickers did she use to decorate the diary?
|
Pink stickers |
Red stickers |
Before |
5x4 = 20 u |
7x3 = 21 u |
Change |
- 2x4 = - 8 u |
- 3x3 = - 9 u |
After |
3x4 = 12 u |
4x3 = 12 u |
The number of pink stickers and red stickers in the end is the same. Make the number of pink stickers and red stickers in the end the same. LCM of 3 and 4 is 12.
Total number of stickers that Min used to decorate the diary
= 20 u + 21 u
= 41 u
41 u = 246
1 u = 246 ÷ 41 = 6
Number of red stickers that Min used to decorate the diary
= 9 u
= 9 x 6
= 54
Answer(s): 54