How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Our product and our sum always give the same answer. Who are we?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Move three sticks of the spiral below to form a square.

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What is the next shape from answers A, B, C, and D figure?

When we see 2 but call 10?