Review: ratio and proportion
Answers are for parents and teachers.
1
Write the ratio 35 : 14 in lowest terms.
5:2
2
In 7 : x = 21 : 15, find x.
5
3
8 kg of apples cost 48,000 soms. How many soms do 11 kg cost?
66000
4
Scale 1 : 500. A wall that is 12 cm on the plan is how many metres in reality?
60
5
Explain in your own words the difference between direct and inverse proportionality.
Direct: when one quantity grows, the other grows by the same factor. Inverse: when one grows, the other shrinks by that factor.