There are 'e' students in a school studying English and 'a' students studying Arabic. How many students study English and Arabic or both, if 'b' students study both?
In still water a boy rows 5 miles an hour. With the aid of current he can make a 21 miles trip in 3 hours. How fast is the current?
The perimeter of a square is 56, the length of each side is
The average of 2, 7, 6 and x is 5 and that of 18, 1, 6 x and y is 10. The value of y is
How many numbers between 1 and 100 are there of the form 7x + 5 where x is a positive integer?
If the lengths of the three sides of a triangle are consecutive integers, then the smallest possible value of the sum of the lengths of the three sides is
What is What is 416% as a fraction ?
A man buys a television set that lists for Tk 36000 at 10% discount. He gets an additional 2% discount for paying cash. How much does he actually pay in Tk?
a : b = 2 : 3 and a + b = 4. What is the value of )a + b) : (b - a)?