Wendy, Zara and Mary have 540 pens altogether. After Zara gave Mary 40 pens and Mary gave Wendy 20 pens, they all have equal number of pens.
- How many pens did each girl have in the end?
- How many pens did Mary have at first?
|
Wendy |
Zara |
Mary |
Total |
Before |
|
|
? |
540 |
Change 1 |
|
- 40 |
+ 40 |
|
Change 2 |
+ 20 |
|
- 20 |
|
After |
180 |
180 |
180 |
540 |
(a)
Number of pens that each of them had in the end
= 540 ÷ 3
= 180
(b)
Number of pens that Mary had at first
= 180 + 20 - 40
= 160
Answer(s): (a) 180; (b) 160