PSLE Riordan had 13 more one-dollar notes than fifty-dollar notes at first. He exchanged $250 worth of fifty-dollar notes for one-dollar notes. How many less fifty-dollar notes than one-dollar notes did Riordan have after the exchange?
Number |
$1 |
$50 |
Before |
1 u + 13 |
1 u |
Change |
+ 250 |
- 5 |
After |
1 u + 13 + 250 |
1 u - 5 |
Number of fifty-dollar notes that Riordan exchanged into one-dollar notes
= 250 ÷ 50
= 5
Number of one-dollar notes that Riordan received from the exchange
= 250 ÷ 1
= 250
Number of less fifty-dollar notes than one-dollar notes
= 13 + 250 + 5
= 268
Answer: 268