If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What 5-letter word typed in all capital letters can be read the same upside down?

Can you find the missing piece of the Porsche?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

If 21x = 79x, what is the value of x?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Can you decipher the below rebus?

PBLUESAISNUERSES

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C