A person bought an article for Tk 800. After 6 months he sold it for Tk 880. Find his annual gain percent?
There are 5.5 billions bacteria. If 1 in 75 millions can do mutation how many bacteria was there possible can do mutation?
If there are 10 gifts and 25 blank seats then what are the probability to win a prize?
The total expense of 15 employees is 27000 including 15% gratuty of service. What is per person expense excluding the gratuty?
5 odd consecutive series, there 6th number is 15.4th number was?
If the price of a product was reduced 10% then 20% then 40%, what was the total discount price?