Fill in the blanks.
The ratio of adults to children is 1 : 1.
The ratio of girls to boys is 1 : 12.
Use LCM and find the following.
- Number of adults = _____ u
- Number of girls = _____ u
- Difference in the number of boys and girls = _____ u
- Total number of people = _____ u
Adults |
Children |
1x13 = 13 u |
1x13 = 13 u |
|
Girls |
Boys |
13 |
1x1 |
12x1 |
13 u |
1 u |
12 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 12 : 1 + 12
1 : 12 : 13
The number of children is the repeated identity.
LCM of 1 and 13 is 13.
Number of adults = 13 u
(b)
Number of girls = 1 u
(c)
Difference in the number of boys and girls
= 12 u - 1 u
= 11 u
(d)
Total number of people
= 13 u + 13 u
= 26 u
Answer(s): (a) 13; (b) 1; (c) 11; (d) 26