At a party,
13 of the people are adults. The remaining group of people is divided into girls and boys in the ratio of 2 : 5. Each girl is given 4 magnets and each boy is given 6 magnets. Each accompanying adult receives 7 magnets. Given that only 325 magnets are given away to girls and adults, how many more children are there than adults?
| Girls |
Boys |
Adults |
| 2x7 |
1x7 |
| 2x2 |
5x2 |
|
| 4 u |
10 u |
7 u |
The number of children is repeated. Make the number of children the same. LCM of 2 and 7 is 14.
| |
Girls |
Boys |
Adults |
| Number |
4 u |
10 u |
7 u |
| Value |
4 |
6 |
7 |
| Total value |
16 u |
60 u |
49 u |
Number of magnets given away to girls and adults
= 16 u + 49 u
= 65 u
1 u = 325 ÷ 65 = 5
Number of children
= 4 u + 10 u
= 14 u
Number of more children than adults
= 14 u - 7 u
= 7 u
= 7 x 5
= 35
Answer(s): 35
