When nnn liters of fuel were added to a tank that was already 1/3 full, it was filled to 7/9 of its capacity. In terms of n, what is the capacity of the tank in liters?

If 1 < x < 7 and 5> y > 2 which of the following must be true?

A box having height 2m, length 10m and width 7m have the top lid open. What is the surface area of the box?

How many positive integers less than ten thousand are multiples of both eight and eighteen?

By selling 20 oranges for one taka-a man losses 4%. How many oranges for one taka should he sell to gain 20%?

If a=4, b=5, c=3, what is the value of 4ab-6ac+2bc ?

5% loss is incurred when Rahim sells a watch for Tk. 1140. At what price should the watch be sold to earn 5% p...