Hilda used
23 of her green stickers and
37 of her grey stickers to decorate her diary. In the end, she had an equal number of green stickers and grey stickers left. Given that Hilda had a total of 95 green and grey stickers at first, how many grey stickers did she use to decorate the diary?
| |
Green stickers |
Grey stickers |
| Before |
3x4 =
12 u |
7x1 =
7 u |
| Change |
- 2x4 =
- 8 u |
- 3x1 =
- 3 u |
| After |
1x4 =
4 u |
4x1 =
4 u |
The number of green stickers and grey stickers in the end is the same. Make the number of green stickers and grey stickers in the end the same. LCM of 1 and 4 is 4.
Total number of stickers that Hilda used to decorate the diary
= 12 u + 7 u
= 19 u
19 u = 95
1 u = 95 ÷ 19 = 5
Number of grey stickers that Hilda used to decorate the diary
= 3 u
= 3 x 5
= 15
Answer(s): 15
