PSLE Paul had 11 more two-dollar notes than fifty-dollar notes at first. He exchanged $900 worth of fifty-dollar notes for two-dollar notes. How many less fifty-dollar notes than two-dollar notes did Paul have after the exchange?
Number |
$2 |
$50 |
Before |
1 u + 11 |
1 u |
Change |
+ 450 |
- 18 |
After |
1 u + 11 + 450 |
1 u - 18 |
Number of fifty-dollar notes that Paul exchanged into two-dollar notes
= 900 ÷ 50
= 18
Number of two-dollar notes that Paul received from the exchange
= 900 ÷ 2
= 450
Number of less fifty-dollar notes than two-dollar notes
= 11 + 450 + 18
= 479
Answer: 479