PSLE At first, Cathy had 60 erasers and some cards. After she gave away 31 erasers and 25% of the cards, she had a total of 56 erasers and cards. How many cards did Cathy have at first?
|
Erasers |
Cards |
Total |
Before |
60 |
4 u |
|
Change |
- 31 |
- 1 u |
|
After |
29 |
3 u |
56 |
25% =
25100 =
14 Number of erasers that Cathy left
= 60 - 31
= 29
Number of cards that Cathy left
= 56 - 29
= 27
3 u = 27
1 u = 27 ÷ 3 = 9
Number of cards that Cathy had at first
= 4 u
= 4 x 9
= 36
Answer(s): 36