Abi used
35 of her silver stickers and
25 of her pink stickers to decorate her diary. In the end, she had an equal number of silver stickers and pink stickers left. Given that Abi had a total of 175 silver and pink stickers at first, how many pink stickers did she use to decorate the diary?
|
Silver stickers |
Pink stickers |
Before |
5x3 = 15 u |
5x2 = 10 u |
Change |
- 3x3 = - 9 u |
- 2x2 = - 4 u |
After |
2x3 = 6 u |
3x2 = 6 u |
The number of silver stickers and pink stickers in the end is the same. Make the number of silver stickers and pink stickers in the end the same. LCM of 2 and 3 is 6.
Total number of stickers that Abi used to decorate the diary
= 15 u + 10 u
= 25 u
25 u = 175
1 u = 175 ÷ 25 = 7
Number of pink stickers that Abi used to decorate the diary
= 4 u
= 4 x 7
= 28
Answer(s): 28