There were
45 as many adults as children on a bus. At the first bus stop, 7 adults and 7 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 |
4x2 =
8 u |
5x2 =
10 u |
1x2 =
2 u |
| Change |
- 7 |
- 7 |
|
| 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
= 8 u - 1 u
= 7 u
7 u = 7
1 u = 7 ÷ 7 = 1
Number of adults in the end
= 1 u
= 1 x 1
= 1
Answer(s): 1
