A student answers 69 questions in an exam. He makes twice as many mistakes as he makes correct answers. How many questions did he get right?  (একটি পরীক্ষায় একজন শিক্ষার্থী ৬৯টি প্রশ্নের উত্তর দেয়। সে যতটি প্রশ্নের সঠিক উত্তর দেয় তার চেয়ে দ্বিগুণ ভুল করেন। সে কতটি প্রশ্নের উত্তর সঠিক করতে পেরেছিল?)

Find the square root of the number you get by multiplying 2205 by a least positive integer. (সর্বনিম্ন একটি ধন...

In a hostel mess there are food supplies for 40 boys to last 30 days. After 9 days, some boys left the hostel....

You got after you increased the numerator of a fraction by 50% and decreased the denominator by 28%. What was...

A box has 210 coins of Tk. 2 and TK. 1. The ratio of the values of the coins is 12:29. How many Tk. 1 coins we...

A student makes twice as many mistake as he makes correct answer in an exam. For each wrong answer is deducted...

A man takes 5 hr. 15 minute to walk a distance and return back by riding a bicycle. It takes 8 hours to walk b...