13 of the people are adults.
57 of the remainder are boys.
There are 18 more boys than adults.
How many people are there?
Adults |
Children |
1 x 7 |
2 x 7 |
|
Boys |
Girls |
|
5 x 2 |
2 x 2 |
7 u |
10 u |
4 u |
The number of children is the combined repeated identity.
Make the number of children the same by using LCM of 2 and 7.
LCM of 2 and 7 = 14
Number of boys = 10 u
Number of adults = 7 u
Number of more boys than adults
= 10 u - 7 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Total number of people
= 7 u + 10 u + 4 u
= 21 u
= 21 x 6
= 126
Answer(s): 126