Move four matchsticks to the below square to form three squares?

Buy me, smell me or deliver me, I do not change.

Who am I?

Can you solve the below tricky visual equation?

Do you know who was buried in John's tomb?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

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

Whats the next number in the below number sequence pattern.

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?