Ratio and Proportion - General Questions

Find the mean proportional between 144 and 49.

Two numbers are in the ratio 4 : 7. If 13 is added to each, the ratio becomes 37 : 55. What is the smaller number?

A bag has Re. 1, 50 paise and 25 paise coins in the ratio 5 : 1 : 1. The total value is Rs. 69. How many 50 paise coins are there?

Divide Rs. 7,800 between A and B in the ratio 9 : 4. What is A's share?

Find the mean proportional between 64 and 121.