13 of the people are adults.
45 of the remainder are boys.
There are 21 more boys than adults.
How many people are there?
Adults |
Children |
1 x 5 |
2 x 5 |
|
Boys |
Girls |
|
4 x 2 |
1 x 2 |
5 u |
8 u |
2 u |
The number of children is the combined repeated identity.
Make the number of children the same by using LCM of 2 and 5.
LCM of 2 and 5 = 10
Number of boys = 8 u
Number of adults = 5 u
Number of more boys than adults
= 8 u - 5 u
= 3 u
3 u = 21
1 u = 21 ÷ 3 = 7
Total number of people
= 5 u + 8 u + 2 u
= 15 u
= 15 x 7
= 105
Answer(s): 105