Sam ranked ninth from the top and thirty-eight from the bottom in a class. How many students are there in the class?

A shopkeeper combined X liters of a solution containing 10% of certain material Q, with 10 liters of another s...

In a class, 120 students are finance major and 100 students are marketing major, 25% of the finance students a...

Fahim and Rishad both started at the same time from point A to point B at speeds of 52 kmph and 39 kmph respec...

If the average of z and x is 35, and the average of x and y is 25, then z-y=?

Arafat and Asif were each paid X taka in advance to do a certain job together. Arafat worked on he job for 10...

If n is a positive integer and n2 is divisible by 72, then what is the largest positive integer that must be a...