Zane gave
19 of his buttons to Justin,
18 of his remaining buttons to Archie and
37 of the rest of his buttons to Riordan. He then had 20 buttons left. How many buttons had he at first?
| Justin |
Remaining buttons |
Total |
| 1 u |
8 u |
9 u |
| |
Archie |
Rest of the buttons |
|
| |
1 u |
7 u |
|
| |
|
Riordan |
Left |
|
| |
|
3 u |
4 u |
|
| |
|
|
20 |
|
Number of buttons that Zane had before = 9 u
Number of buttons that Zane gave to Justin = 1 u
Number of buttons that Zane gave to Archie = 1 u
Number of buttons that Zane gave to Riordan = 3 u
Number of buttons that Zane had left = 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Number of buttons that Zane had at first
= 9 u
= 9 u x 5
= 45
Answer(s): 45
