What is the ratio of the sum of the even positive integers between 1 and 100 (inclusive) and the sum of the odd positive integers between 100 and 150?

Arif is now 5 times as old as Babu, but 7 years now he will be 3 times as old as babu. How old is Arif now?

If x is an even number, what is the difference between the smallest ever number grater than (5x+6) and the lar...

Babu gave 20% of his marbles to Sadeq, and 20% of the rest of marbles to Tipu. If he now has 320 marbles, how...

What is the radius of the in-circle of the triangle whose sides measure 5, 12 and 13 units?

If -2

A car averages 25 miles per gallon of gasoline when driven in the city and 40 miles per gallon when driven on...