Which number is added to 5, 7, 9 and 12 that we get proportion in them.
Shadow of 40ft high pole is 60ft long. Find the height of a person if its shadow is 9ft.
Person A has some oranges. By adding 5/3 of these oranges to the original number, the total becomes 80. How many oranges person A has?
For what value of x, the ratio 3+x : 2+4x is equal to the ratio 2:3
The ratio between two numbers is 3:2. If 8 is subtracted from both numbers then the new ratio becomes 5:6. Find the numbers.