PSLE Glen had 15 more five-dollar notes than fifty-dollar notes at first. He exchanged $750 worth of fifty-dollar notes for five-dollar notes. How many less fifty-dollar notes than five-dollar notes did Glen have after the exchange?
Number |
$5 |
$50 |
Before |
1 u + 15 |
1 u |
Change |
+ 150 |
- 15 |
After |
1 u + 15 + 150 |
1 u - 15 |
Number of fifty-dollar notes that Glen exchanged into five-dollar notes
= 750 ÷ 50
= 15
Number of five-dollar notes that Glen received from the exchange
= 750 ÷ 5
= 150
Number of less fifty-dollar notes than five-dollar notes
= 15 + 150 + 15
= 180
Answer: 180