Ivory had 144 cards. Simon had 58 of what Ivory had. After Ivory used some of his cards and Simon used 12 of his cards, Ivory had 13 as many cards left as Simon.
- How many cards did Simon have at first?
- How many cards did Ivory use?
| |
Ivory |
Simon |
| Before |
144 |
90 |
| Change |
- ? |
- 45 |
| After |
15 |
45 |
(a)
Number of cards that Simon had at first
=
58 x 144
= 90
(b)
Number of cards that Simon used
=
12 x 90
= 45
Number of cards that Simon had left
= 90 - 45
= 45
Number of cards that Ivory had left
=
13 x 45
= 15
Number of cards that Ivory used
= 144 - 15
= 129
Answer(s): (a) 90; (b) 129
