You can see three almost identical images below. Can you spot the odd one out from them?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Can you decipher the two rows to find the hidden word?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

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

Rectify the following equality 101 - 102 = 1 by moving just one digit.

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?