How many times do a clock's hands overlap in a day ?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

It belongs to you, but other people use it more than you do. What is it?

When is the top of a mountain similar to a savings account?

What brings you down but never up?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

What month of the year has 28 days?

What is common among 11, 69, and 88?