There are 650 people,
of which 30 are men.
There are 600 less adults than women.
- How many children are there?
- How many adults are there?
- How many less children than adults are there?
- How many more women than men are there?
(a)
Number of men = 30
Number of children = 1 u
Number of women = 1 u + 600
Total number of people
= 30 + 1 u + 1 u + 600
= 1 u + 1 u + 30 + 600
= 2 u + 630
2 u + 630 = 650
2 u = 650 - 630
2 u = 20
1 u = 20 ÷ 2 = 10
Number of children
= 1 u
= 10
(b)
Number of adults
= 30 + 1 u + 600
= 30 + 10 + 600
= 640
(c)
Number of less children than adults
= 640 - 10
= 630
(d)
Number of more women than men
= 1 u + 600 - 30
= 10 + 600 - 30
= 580
Answer(s): (a) 10; (b) 640; (c) 630; (d) 580