There were some adults and children at a celebration.
37 of the people were adults.
23 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 celebration?
Adults |
Children |
Total |
3x3 |
4x3 |
7x3 |
|
Boys |
Girls |
|
|
2x4 |
1x4 |
|
9 u |
8 u |
4 u |
21 u |
(a)
The number of children is the combined repeated identity.
Number of girls = 4 u
4 u = 36
1 u = 36 ÷ 4 = 9
Number of children
= 12 u
= 12 x 9
= 108
(b)
Number of more children than adults
= 12 u - 9 u
= 3 u
= 3 x 9
= 27
Answer(s): (a) 108; (b) 27