Which flower has two lips?

Can you replace the question mark with the correct number in the below table sequence?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What is the centre of gravity?