How many prime numbers are less than 50?

What least number must be added to 1056 so that the sum is completely divisible by 23?

The difference between two numbers is 20% of the larger number. If the smaller number is 16, the larger number is:

A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train? 

In a box, there are 8 red, 7 blue, and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

 The banker's discount on Rs. 1600 at 15% per annum is the same as true discount on Rs. 1680 for the same time and at the same rate. The time is: 

Introducing a boy named Sam to her friend Rita, a girl named Suman said, "He is the son of the daughter of the father of my uncle." How is Sam related to Suman?

A,B & C starts a business with a initial capital of Rs.2000,Rs.3000 and Rs.4000. After one year, A withdraws his amount. If the net profit after 2 years is Rs.3200, then find the A's profit.

Which of the following results in the maximum discount on a product?