If A : B : C = 1 : 4 : 7 and B = (2x)% of (A + C), then x is :

If 30% of A = 0.25 of B = $\frac{1}{5}$ of C, then find A: B: C.

The sum of three numbers is $136$. If the ratio between the first number and the second number is $2 : 3$ and that between the second and the third number is $5 : 3$, then the first number is:

If $\frac{x}{y} = \frac{3}{5}$ and $\frac{y}{z} = \frac{5}{2}$ then $\frac{x^2 + z^2}{x^2 - z^2}$ would be

If $5A = 4B$, $7B = 3C$ and $2C = 7D$, then A : D is :

A bag contains five-rupee, one-rupee, 50-paise, and 25-paise coins in the ratio 3 : 5 : 6 : 8. If the total amount of money in the bag is ₹225. The number of coins of each kind in ascending order :

(A) No. of coins of 25 paise

(B) No. of coins of one rupee

(C) No. of coins of 50 paise

(D) No. of coins of five rupee

Choose the correct answer from the options given below:

If $\sqrt{6} : x :: \sqrt{3} : (1 + \sqrt{2})$, then x is equal to