A class of 20 students borrowed library books for their research projected. Some of the students borrowed 3 books each, and the rest borrowed 2 books each. If a total of 52 books were borrowed, how many of the students borrowed, how many of the students borrowed 3 books each?

If 4 times an integer x is increased by 10, the result is always greater than 10 and less than 34. What is the...

The electric company charges Tk. 0.30 per kilowatt-hour (KWH). Rahim used 2800 KWH in April, 3200 KWH in May,...

How many liters of fuel are needed for a steamer to sail 700 kilometers if it uses 80 liters of fuel to sail 3...

The price of an item changed from Tk. 120 to Tk. 100. Later, the price decreased again from Tk. 100 to Tk. 80...

If a coin is tossed once, what is the probability of getting a "HEAD"

What is the next number in the series? 8, 11, 17, 24, 29, 53, 78 ...........