What number must be added to (x2 - 18x) to make the result a perfect square?
If a circle has a radius 4, and if P and Q are points on the circumference, then the maximum length of an arc which could separate P and Q is
A business man buys a pen for Tk. 25.00. He spends Tk.15.00 to have it restored to good condition and then sells the same for Tk. 50.00. The percentage of profit on his total investment is
২০%
২৫%
৪০%
100%
If a > b > c then which of the followings must be true?
How many pounds of pure salt must be added to 30 pounds of a 2% solution of salt and water to increase it to a 10% solution?
A Coat of Tk. 400 sells for how much after successive discounts of 10% and 5% ?