Riordan gave
19 of his buttons to Will,
38 of his remaining buttons to Ben and
15 of the rest of his buttons to Andy. He then had 8 buttons left. How many buttons had he at first?
Will |
Remaining buttons |
Total |
1 u |
8 u |
9 u |
|
Ben |
Rest of the buttons |
|
|
3 u |
5 u |
|
|
|
Andy |
Left |
|
|
|
1 u |
4 u |
|
|
|
|
8 |
|
Number of buttons that Riordan had before = 9 u
Number of buttons that Riordan gave to Will = 1 u
Number of buttons that Riordan gave to Ben = 3 u
Number of buttons that Riordan gave to Andy = 1 u
Number of buttons that Riordan had left = 4 u
4 u = 8
1 u = 8 ÷ 4 = 2
Number of buttons that Riordan had at first
= 9 u
= 9 u x 2
= 18
Answer(s): 18