Question

find which of the following sets of numbers are in direct or indirect proportion?

1. 12, 72, 1, 6
2. 10, 5, 2, 4

Method
1. Answer is
Product of = Product of
extremes means
12 x 6 = 72x 1
72 = 72
Direct Proportion

2. Answer is
$\frac{10}{5} \: \: \: \: \frac{2}{4} \\ \\ \frac{2}{1} \: \: inverse \: \: = \frac{1}{2} \\ - > \: the \: terms \: are \: in \: indirect \: proportion$
I cant understand 2nd answer method please help
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Answer 1

Answer:

The question is...10,5,2,4

If we make fraction of 10/5 , 2/4 and then simplify it..

We will get 2/1 (10/5) and 1/2 (2/4)

So, 2/1 > 1/2

They are not in proportion...

I hope you understand...