Question

what number has a 5:1 ratio to the number 10?

Answer 1

50 is the answer if 10 is the 2nd number
2 is the answer if 10 is the 1st number

Answer 2

The number 50 has the ratio of 5:1 to the number 10.

Solution:

Let us consider the finding number as X.

According to the Question, X has a 5:1 ratio to the number 10.

Therefore,  

From the given, that the number 10 is having a ratio of 5:1 to another number.

Then for finding the other number, by simplifying the ratio of the number 10 and the other number which is to be found is equal to the ratio of 5:1.  

⟹ X:10=5:1

$\Rightarrow \frac{X}{10}=\frac{5}{1}$

$\Rightarrow X=\left(\frac{5}{1}\right) \times 10$

X=50

Hence the number is 50.