এক ব্যক্তির বয়স তাঁর তিন পুত্রের বয়সের সমষ্টির দ্বিগুণ। তাহলে পুত্রের গড় বয়স পিতার বয়সের কত অংশ?

A businessman has 1000 Kg of rice,part of which he sells at 8% profit and the rest at 185% profit . He gains 1...

The sum of three consecutive odd integers is 40 more than the first of the numbers.What is the middle number ?

If Rahim walks at 14 km/hr instead of 10 km/hr for a certain time ,he would have walked 20 km more. If Rahim w...

Pens that used to cost Tk.150 for a package of 3 now cost Tk.300 for a package of 5. What is the percent incre...

A year ago the price of a toothbrush and the price of a comb were both Tk.50. The price of the toothbrush was...

When the positive integer n is divided by 5, the remainder is 2.Which of the following must be true ?