PSLE At first, Mary had 95 stamps and some pens. After she gave away 67 stamps and 60% of the pens, she had a total of 42 stamps and pens. How many pens did Mary have at first?
|
Stamps |
Pens |
Total |
Before |
95 |
5 u |
|
Change |
- 67 |
- 3 u |
|
After |
28 |
2 u |
42 |
60% =
60100 =
35 Number of stamps that Mary left
= 95 - 67
= 28
Number of pens that Mary left
= 42 - 28
= 14
2 u = 14
1 u = 14 ÷ 2 = 7
Number of pens that Mary had at first
= 5 u
= 5 x 7
= 35
Answer(s): 35