PSLE Riordan had 18 more two-dollar notes than fifty-dollar notes at first. He exchanged $950 worth of fifty-dollar notes for two-dollar notes. How many more two-dollar notes than fifty-dollar notes did Riordan have after the exchange?
Number |
$2 |
$50 |
Before |
1 u + 18 |
1 u |
Change |
+ 475 |
- 19 |
After |
1 u + 18 + 475 |
1 u - 19 |
Number of fifty-dollar notes that Riordan exchanged into two-dollar notes
= 950 ÷ 50
= 19
Number of two-dollar notes that Riordan received from the exchange
= 950 ÷ 2
= 475
Number of more two-dollar notes than fifty-dollar notes
= 18 + 475 + 19
= 512
Answer: 512