If x: y = 3:5 and z : w = 2x : 5y, then what is the value of xz : yw?

A, B and C are sections of Class X. The ratio of A : B is 9 : 4 and that of A : C is 3 : 2. Find A : B : C.

If 4 : 16 :: 7.3 : x and 4 : 32 :: 7 : y. What is the ratio of x to y?

In a bag containing red, green, and pink tokens, the ratio of red to green tokens is 7 : 4, while the ratio of pink to red tokens is 20 : 11. What is the ratio of green to pink tokens?​

If a : b = 3 : 4 and b : c = 4 : 7, then $$\frac{a + b + c}{c}$$ is equal to:​

A sum of ₹8,415 is divided between A. B and C such that the ratio of the share of B to the combined shares of A and C is 3 : 8 and the ratio of C's share to the combined share of A and B is 4 : 11. What is the share of A?

A sum of ₹4,200 is divided among A, B, C and D such that the share of B is equal to $$\frac{2}{3}$$​ of the share of C and the share of C is equal to $$\frac{9}{13}$$​ of the share of D. If the ratio of the share of A and B is 8 : 9, then the difference between the shares of B and D will be:

If a : b = c : d = e : f = 2 : 3, then (xa + yc +ze) : (xb + yd + zf) = __________.

If P : Q =3 : 4, Q : R = 5 : 2 and R : S = 3 : 2, then what is the value of P : R : S?

A tree is at present 9 feet tall. If every year it grows $$\frac{1}{9}$$th of its height. What will be the height of the tree after three years?