PSLE Cole had 11 more one-dollar notes than five-dollar notes at first. He exchanged $90 worth of five-dollar notes for one-dollar notes. How many more one-dollar notes than five-dollar notes did Cole have after the exchange?
Number |
$1 |
$5 |
Before |
1 u + 11 |
1 u |
Change |
+ 90 |
- 18 |
After |
1 u + 11 + 90 |
1 u - 18 |
Number of five-dollar notes that Cole exchanged into one-dollar notes
= 90 ÷ 5
= 18
Number of one-dollar notes that Cole received from the exchange
= 90 ÷ 1
= 90
Number of more one-dollar notes than five-dollar notes
= 11 + 90 + 18
= 119
Answer: 119