There were
45 as many children as adults on a bus. At the first bus stop, 3 children and 3 adults alighted the bus. There were then
57 as many children as adults. How many children were on the bus in the end?
| |
Children |
Adults |
Difference |
| Before |
4x2 =
8 u |
5x2 =
10 u |
1x2 =
2 u |
| Change |
- 3 |
- 3 |
|
| After |
5x1 =
5 u |
7x1 =
7 u |
2x1 =
2 u |
Since equal number of children and adults alighted the bus, the difference in the number of children and adults at first and in the end remains the same. LCM of 2 and 1 is 2.
Number of children who alighted the bus
= 8 u - 5 u
= 3 u
3 u = 3
1 u = 3 ÷ 3 = 1
Number of children in the end
= 5 u
= 5 x 1
= 5
Answer(s): 5
