There are 100 people,
of which 20 are men.
There are 60 more children than women.
- How many children are there?
- How many adults are there?
- How many more children than adults are there?
- How many less women than men are there?
(a)
Number of men = 20
Number of women = 1 u
Number of children = 1 u + 60
Total number of people
= 20 + 1 u + 1 u + 60
= 1 u + 1 u + 20 + 60
= 2 u + 80
2 u + 80 = 100
2 u = 100 - 80
2 u = 20
1 u = 20 ÷ 2 = 10
Number of children
= 1 u + 60
= 10 + 60
= 70
(b)
Number of adults
= 20 + 10
= 30
(c)
Number of more children than adults
= 70 - 30
= 40
(d)
Number of less women than men
= 20 - 10
= 10
Answer(s): (a) 70; (b) 30; (c) 40; (d) 10