The ratio of the present ages of Sunita and Vinita is 4 : 5. Six years hence the ratio of their ages will be 14 : 17. What will be the ratio of their ages 12 years hence?

Study the given pattern carefully and select the number that can replace the question mark (?) in it.
 First row: 18, 9, 27
 Second row: 40, 36, 140
 Third row: 40, 13, ?
 (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding / subtracting / multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

The marked price of a table fan is ₹3,750 and is available to the retailer at a discount of 20%. At what price should the retailer sell it to earn a profit of 15%?

Complete the series choosing the missing number:

324, 108, 36, 12, ______

Simplification the following equations shown below