The centre of the third figure is empty. What digit should fit inside?

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

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?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

What is the fastest way to double your money?

Find the hidden panda in the image below.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Can you identify the Oscar-winning movie from the rebus below?

You see me once in June, twice in November, and not at all in May. What am I?