PSLE Oscar had 20 more two-dollar notes than fifty-dollar notes at first. He exchanged $450 worth of fifty-dollar notes for two-dollar notes. How many less fifty-dollar notes than two-dollar notes did Oscar have after the exchange?
Number |
$2 |
$50 |
Before |
1 u + 20 |
1 u |
Change |
+ 225 |
- 9 |
After |
1 u + 20 + 225 |
1 u - 9 |
Number of fifty-dollar notes that Oscar exchanged into two-dollar notes
= 450 ÷ 50
= 9
Number of two-dollar notes that Oscar received from the exchange
= 450 ÷ 2
= 225
Number of less fifty-dollar notes than two-dollar notes
= 20 + 225 + 9
= 254
Answer: 254