There were some adults and children at a gathering.
49 of the people were adults.
34 of the children were boys and the rest were girls. There were 25 girls.
- How many children were there?
- How many more children than adults were at the gathering?
Adults |
Children |
Total |
4x4 |
5x4 |
9x4 |
|
Boys |
Girls |
|
|
3x5 |
1x5 |
|
16 u |
15 u |
5 u |
36 u |
(a)
The number of children is the combined repeated identity.
Number of girls = 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Number of children
= 20 u
= 20 x 5
= 100
(b)
Number of more children than adults
= 20 u - 16 u
= 4 u
= 4 x 5
= 20
Answer(s): (a) 100; (b) 20