A dishonest trader mixes 2kg of vegetable ghee costing Tk. 45 a kg with 3 kg of standard ghee costing Tk. 70 per kg. He sells the mixed ghee at Tk. 65 per kg. What is his percentage of profit?

If positive integers x and y are not both odd, which of the following must be even?

If the numbers 17/24, 1/2, 3/8, 3/4 and 9/16 were ordered greatest to least, the middle number of the resultin...

Last year if 97% of the revenues of a company came from domestic sources and the remaining revenues, totaling...

If the length and width of a rectangular garden plot were each increased by 20%, what would be the percent inc...

Salem earns Tk. 8.50 per hour on days other than Sundays and twice that rate on Sundays. Last week he worked a...

If a, b and c are constants, a>b>c, and x3-x=(x-a)(x-b)(x-c) for all numbers x, what is the value of b?