Esther and Kathy have 610 pens altogether. Kathy has four times as many pens as Esther. How many pens must Kathy give to Esther so that they have the same number of pens?
|
Esther |
Kathy |
Total |
Before |
1 u |
4 u |
610 |
Change |
+ ? |
- ? |
|
After |
305 |
305 |
610 |
Total number of pens that Esther and Kathy have
= 1 u + 4 u
= 5 u
5 u = 610
1 u = 610 ÷ 5 = 122
Number of pens that Esther and Kathy each has in the end
= 610 ÷ 2
= 305
Number of pens that Kathy must give to Esther
= 305 - 122
= 183
Answer(s): 183