What goes up but never comes down?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

In the picture given below, can you find out which digit will take place of the question mark?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Spot the cat in the picture below

I taste better than I can smell. Who am I?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?