PSLE Valen had 11 more two-dollar notes than five-dollar notes at first. He exchanged $60 worth of five-dollar notes for two-dollar notes. How many less five-dollar notes than two-dollar notes did Valen have after the exchange?
Number |
$2 |
$5 |
Before |
1 u + 11 |
1 u |
Change |
+ 30 |
- 12 |
After |
1 u + 11 + 30 |
1 u - 12 |
Number of five-dollar notes that Valen exchanged into two-dollar notes
= 60 ÷ 5
= 12
Number of two-dollar notes that Valen received from the exchange
= 60 ÷ 2
= 30
Number of less five-dollar notes than two-dollar notes
= 11 + 30 + 12
= 53
Answer: 53