A retail buyer purchases 15 white dress shirts for Tk 1000 and 5 striped dress shirts for Tk 400. At what average price (in Tk) the retailer should sell a dress shirt if he wants to make a profit of Tk 50 each shirt?

Alam spent 20% of his income on taxes and 20% of the reminder on rent. What per cent of his income he has spen...

Which of the following is the lowest positive integer divisible by 2,3,4,5,6,7,8 and 9?

20 men can finish a work in 30 days. After how many days should 5 men leave the work so that the work may be f...

Three pipes can independently fill a water tank in 10,12 and 15 hours. How many hours will it take for all thr...

In a class of 30 students 18 play football, 14 play cricket and 5 do not play any game. How many students play...

If a : b is 4 : 7 and b : c is 5 : 6, then a : b : c is ---