Fabian gave
111 of his marbles to Elijah,
310 of his remaining marbles to Mark and
17 of the rest of his marbles to David. He then had 12 marbles left. How many marbles had he at first?
| Elijah |
Remaining marbles |
Total |
| 1 u |
10 u |
11 u |
| |
Mark |
Rest of the marbles |
|
| |
3 u |
7 u |
|
| |
|
David |
Left |
|
| |
|
1 u |
6 u |
|
| |
|
|
12 |
|
Number of marbles that Fabian had before = 11 u
Number of marbles that Fabian gave to Elijah = 1 u
Number of marbles that Fabian gave to Mark = 3 u
Number of marbles that Fabian gave to David = 1 u
Number of marbles that Fabian had left = 6 u
6 u = 12
1 u = 12 ÷ 6 = 2
Number of marbles that Fabian had at first
= 11 u
= 11 u x 2
= 22
Answer(s): 22
