PSLE Andy had 13 more two-dollar notes than five-dollar notes at first. He exchanged $60 worth of five-dollar notes for two-dollar notes. How many more two-dollar notes than five-dollar notes did Andy have after the exchange?
Number |
$2 |
$5 |
Before |
1 u + 13 |
1 u |
Change |
+ 30 |
- 12 |
After |
1 u + 13 + 30 |
1 u - 12 |
Number of five-dollar notes that Andy exchanged into two-dollar notes
= 60 ÷ 5
= 12
Number of two-dollar notes that Andy received from the exchange
= 60 ÷ 2
= 30
Number of more two-dollar notes than five-dollar notes
= 13 + 30 + 12
= 55
Answer: 55