The ratio between the third proportional of 12 and 30 and mean proportional of 9 and 25 is

Sum and product of two numbers is 11 and 18 respectively. What will be the sum of their reciprocals? 

The ratio 75: 125 in its simplest form is written as: 

If P is 15 years old now and Q will be 26 years old after 6 years, what is the ratio of their percentages? 

Four numbers are in the ratio 1 : 2 : 3 : 4 . Their sum is 16. The sum of the first and fourth number is equal to: 

Divide Rs. 7,500 among A, B and C such that A’s share to B’s share is in the ratio 5:2 and B’s share to C’s share is in the ratio 7 : 13. How much will B receive ?

The ratio between the boys and girls in a class is 6:5 respectively. If 8 more boys join the class and two girls leave the class then the respective ratio become 11:7. What is the number of boys in the class now?

A sum of ₹340. 68 is distributed among L, M and N such that L gets ₹ 5.72 more than N and M gets ₹2.24 more than L, N gets