Tiffany had 300 marbles. Ben had 34 of what Tiffany had. After Tiffany used some of his marbles and Ben used 13 of his marbles, Tiffany had 25 as many marbles left as Ben.
- How many marbles did Ben have at first?
- How many marbles did Tiffany use?
|
Tiffany |
Ben |
Before |
300 |
225 |
Change |
- ? |
- 75 |
After |
60 |
150 |
(a)
Number of marbles that Ben had at first
=
34 x 300
= 225
(b)
Number of marbles that Ben used
=
13 x 225
= 75
Number of marbles that Ben had left
= 225 - 75
= 150
Number of marbles that Tiffany had left
=
25 x 150
= 60
Number of marbles that Tiffany used
= 300 - 60
= 240
Answer(s): (a) 225; (b) 240