Zeph gave
19 of his erasers to Warren,
38 of his remaining erasers to Japheth and
15 of the rest of his erasers to David. He then had 16 erasers left. How many erasers had he at first?
| Warren |
Remaining erasers |
Total |
| 1 u |
8 u |
9 u |
| |
Japheth |
Rest of the erasers |
|
| |
3 u |
5 u |
|
| |
|
David |
Left |
|
| |
|
1 u |
4 u |
|
| |
|
|
16 |
|
Number of erasers that Zeph had before = 9 u
Number of erasers that Zeph gave to Warren = 1 u
Number of erasers that Zeph gave to Japheth = 3 u
Number of erasers that Zeph gave to David = 1 u
Number of erasers that Zeph had left = 4 u
4 u = 16
1 u = 16 ÷ 4 = 4
Number of erasers that Zeph had at first
= 9 u
= 9 u x 4
= 36
Answer(s): 36
