A Coat of Tk. 400 sells for how much after successive discounts of 10% and 5% ?

What number must be added to (x² - 18x) to make the result a perfect square?

An investor invests 30%, 40%, 20% and 10% of his total investable amount in four different shares of stock giving returns of 15%, 20%, 12% and 10% respectively. What is the average rate of his returns?

A Jar contains white, red and green marbles in the ratios 2: 3: 4. Five more green balls are added to the Jar and the ratios become 2: 3: 5. How many white balls are there in the Jar?

Square RSTU shown below is rotated in a plane about its center in a clockwise direction. The minimum number of degrees necessary for T to be in the position where S is