PSLE At first, Lynn had 82 buttons and some marbles. After she gave away 36 buttons and 25% of the marbles, she had a total of 67 buttons and marbles. How many marbles did Lynn have at first?
|
Buttons |
Marbles |
Total |
Before |
82 |
4 u |
|
Change |
- 36 |
- 1 u |
|
After |
46 |
3 u |
67 |
25% =
25100 =
14 Number of buttons that Lynn left
= 82 - 36
= 46
Number of marbles that Lynn left
= 67 - 46
= 21
3 u = 21
1 u = 21 ÷ 3 = 7
Number of marbles that Lynn had at first
= 4 u
= 4 x 7
= 28
Answer(s): 28