PSLE Elijah had 18 more two-dollar notes than ten-dollar notes at first. He exchanged $140 worth of ten-dollar notes for two-dollar notes. How many less ten-dollar notes than two-dollar notes did Elijah have after the exchange?
Number |
$2 |
$10 |
Before |
1 u + 18 |
1 u |
Change |
+ 70 |
- 14 |
After |
1 u + 18 + 70 |
1 u - 14 |
Number of ten-dollar notes that Elijah exchanged into two-dollar notes
= 140 ÷ 10
= 14
Number of two-dollar notes that Elijah received from the exchange
= 140 ÷ 2
= 70
Number of less ten-dollar notes than two-dollar notes
= 18 + 70 + 14
= 102
Answer: 102