There were some adults and children at a party.
49 of the people were adults.
37 of the children were boys and the rest were girls. There were 40 girls.
- How many children were there?
- How many more children than adults were at the party?
Adults |
Children |
Total |
4x7 |
5x7 |
9x7 |
|
Boys |
Girls |
|
|
3x5 |
4x5 |
|
28 u |
15 u |
20 u |
63 u |
(a)
The number of children is the combined repeated identity.
Number of girls = 20 u
20 u = 40
1 u = 40 ÷ 20 = 2
Number of children
= 35 u
= 35 x 2
= 70
(b)
Number of more children than adults
= 35 u - 28 u
= 7 u
= 7 x 2
= 14
Answer(s): (a) 70; (b) 14