How many times can you subtract the number two from the number fifty?

What has many teeth, but cannot bite?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Which is faster, Heat or Cold ? Explain.

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Can you spot the hidden girl in the picture below?

Which English verb becomes past tense just by rearranging the letters?