The ratio of the number of boys to that of girls in a class is 5 : 7. When 24 more boys enter, the ratio is reversed. How many girls are in the class?

The sum of 3 consecutive multiple of 3 is 90. What is the largest of these numbers?

Two-thirds of the members of a committee are women, one-fourth of the male members of the committee are marrie...

A man buys a television set that lists for Tk 36000 at 10% discount. He gets an additional 2% discount for pay...

There are 'e' students in a school studying English and 'a' students studying Arabic. How many students study...

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...

If x + 1 > 1 - 2x then