Gem had 216 marbles. John had 13 of what Gem had. After Gem used some of his marbles and John used 19 of his marbles, Gem had 12 as many marbles left as John.
- How many marbles did John have at first?
- How many marbles did Gem use?
| |
Gem |
John |
| Before |
216 |
72 |
| Change |
- ? |
- 8 |
| After |
32 |
64 |
(a)
Number of marbles that John had at first
=
13 x 216
= 72
(b)
Number of marbles that John used
=
19 x 72
= 8
Number of marbles that John had left
= 72 - 8
= 64
Number of marbles that Gem had left
=
12 x 64
= 32
Number of marbles that Gem used
= 216 - 32
= 184
Answer(s): (a) 72; (b) 184
