Luis gave
16 of his pens to Oscar,
25 of his remaining pens to Henry and
13 of the rest of his pens to Andy. He then had 10 pens left. How many pens had he at first?
| Oscar |
Remaining pens |
Total |
| 1 u |
5 u |
6 u |
| |
Henry |
Rest of the pens |
|
| |
2 u |
3 u |
|
| |
|
Andy |
Left |
|
| |
|
1 u |
2 u |
|
| |
|
|
10 |
|
Number of pens that Luis had before = 6 u
Number of pens that Luis gave to Oscar = 1 u
Number of pens that Luis gave to Henry = 2 u
Number of pens that Luis gave to Andy = 1 u
Number of pens that Luis had left = 2 u
2 u = 10
1 u = 10 ÷ 2 = 5
Number of pens that Luis had at first
= 6 u
= 6 u x 5
= 30
Answer(s): 30
