PSLE Ivan had 18 more two-dollar notes than ten-dollar notes at first. He exchanged $50 worth of ten-dollar notes for two-dollar notes. How many more two-dollar notes than ten-dollar notes did Ivan have after the exchange?
Number |
$2 |
$10 |
Before |
1 u + 18 |
1 u |
Change |
+ 25 |
- 5 |
After |
1 u + 18 + 25 |
1 u - 5 |
Number of ten-dollar notes that Ivan exchanged into two-dollar notes
= 50 ÷ 10
= 5
Number of two-dollar notes that Ivan received from the exchange
= 50 ÷ 2
= 25
Number of more two-dollar notes than ten-dollar notes
= 18 + 25 + 5
= 48
Answer: 48