There were some adults and children at a gathering.
37 of the people were adults.
25 of the children were boys and the rest were girls. There were 36 girls.
- How many children were there?
- How many more children than adults were at the gathering?
Adults |
Children |
Total |
3x5 |
4x5 |
7x5 |
|
Boys |
Girls |
|
|
2x4 |
3x4 |
|
15 u |
8 u |
12 u |
35 u |
(a)
The number of children is the combined repeated identity.
Number of girls = 12 u
12 u = 36
1 u = 36 ÷ 12 = 3
Number of children
= 20 u
= 20 x 3
= 60
(b)
Number of more children than adults
= 20 u - 15 u
= 5 u
= 5 x 3
= 15
Answer(s): (a) 60; (b) 15