There are 40 people,
of which 10 are women.
There are 20 more children than men.
- How many children are there?
- How many adults are there?
- How many more children than adults are there?
- How many less men than women are there?
(a)
Number of women = 10
Number of men = 1 u
Number of children = 1 u + 20
Total number of people
= 10 + 1 u + 1 u + 20
= 1 u + 1 u + 10 + 20
= 2 u + 30
2 u + 30 = 40
2 u = 40 - 30
2 u = 10
1 u = 10 ÷ 2 = 5
Number of children
= 1 u + 20
= 5 + 20
= 25
(b)
Number of adults
= 10 + 5
= 15
(c)
Number of more children than adults
= 25 - 15
= 10
(d)
Number of less men than women
= 10 - 5
= 5
Answer(s): (a) 25; (b) 15; (c) 10; (d) 5