PSLE Peter had 13 more two-dollar notes than ten-dollar notes at first. He exchanged $60 worth of ten-dollar notes for two-dollar notes. How many more two-dollar notes than ten-dollar notes did Peter have after the exchange?
Number |
$2 |
$10 |
Before |
1 u + 13 |
1 u |
Change |
+ 30 |
- 6 |
After |
1 u + 13 + 30 |
1 u - 6 |
Number of ten-dollar notes that Peter exchanged into two-dollar notes
= 60 ÷ 10
= 6
Number of two-dollar notes that Peter received from the exchange
= 60 ÷ 2
= 30
Number of more two-dollar notes than ten-dollar notes
= 13 + 30 + 6
= 49
Answer: 49