Mary, Xylia and Barbara have 543 pens altogether. After Xylia gave Barbara 55 pens and Barbara gave Mary 18 pens, they all have equal number of pens.
- How many pens did each girl have in the end?
- How many pens did Barbara have at first?
|
Mary |
Xylia |
Barbara |
Total |
Before |
|
|
? |
543 |
Change 1 |
|
- 55 |
+ 55 |
|
Change 2 |
+ 18 |
|
- 18 |
|
After |
181 |
181 |
181 |
543 |
(a)
Number of pens that each of them had in the end
= 543 ÷ 3
= 181
(b)
Number of pens that Barbara had at first
= 181 + 18 - 55
= 144
Answer(s): (a) 181; (b) 144