There were
56 as many adults as children on a bus. At the first bus stop, 18 adults and 18 children alighted the bus. There were then
13 as many adults as children. How many adults were on the bus in the end?
| |
Adults |
Children |
Difference |
| Before |
5x2 =
10 u |
6x2 =
12 u |
1x2 =
2 u |
| Change |
- 18 |
- 18 |
|
| After |
1x1 =
1 u |
3x1 =
3 u |
2x1 =
2 u |
Since equal number of adults and children alighted the bus, the difference in the number of adults and children at first and in the end remains the same. LCM of 2 and 1 is 2.
Number of adults who alighted the bus
= 10 u - 1 u
= 9 u
9 u = 18
1 u = 18 ÷ 9 = 2
Number of adults in the end
= 1 u
= 1 x 2
= 2
Answer(s): 2
