Pierre gave
16 of his marbles to George,
25 of his remaining marbles to Jenson and
13 of the rest of his marbles to Mark. He then had 40 marbles left. How many marbles had he at first?
| George |
Remaining marbles |
Total |
| 1 u |
5 u |
6 u |
| |
Jenson |
Rest of the marbles |
|
| |
2 u |
3 u |
|
| |
|
Mark |
Left |
|
| |
|
1 u |
2 u |
|
| |
|
|
40 |
|
Number of marbles that Pierre had before = 6 u
Number of marbles that Pierre gave to George = 1 u
Number of marbles that Pierre gave to Jenson = 2 u
Number of marbles that Pierre gave to Mark = 1 u
Number of marbles that Pierre had left = 2 u
2 u = 40
1 u = 40 ÷ 2 = 20
Number of marbles that Pierre had at first
= 6 u
= 6 u x 20
= 120
Answer(s): 120
