The respectively ratio between the present age of Aarti and Savita is $5:x.$ Aarti is 9 yr younger than Jahnavi. Jahnavi's age after 9 yr will be 33 yr. The difference between Savita's and Aarti's age is same as the present age of Jahnavi. What will come in place of x?

What is the combined ratio of 3:2, 7:4 and 6:5?

In a mixture of $165$ litres, the ratio of liquids $X$ and $Y$ is $6:5$. If $5$ litres of liquid $Y$ is added in the mixture, then what is the ratio of $X$ and $Y$ in the new mixture ?

If we divide 184 kg in the ratio 2 : 3 : 3, the relevant measures in kg are:

(A) 26, 79 and 79 

(B) 6, 89 and 89 

(C) 46, 79 and 79 

(D) 46, 69 and 69 

What is the $4th$ proportional of $3, 8, 12$ ? 

1. $36$

2. $26$

3. $32$

4. $16$

A box contains one rupee, fifty paisa and twenty five paisa coins. The total number of coins are $378$. The ratio of values of the above coins is $13:11:7$. The number of twenty five paise coins was:

In water, The ratio of the mass of hydrogen to the mass of oxygen is always _____.