What goes up but never comes down?

Prove that twice of ten is the same as twice of eleven.

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

How many times do a clock's hands overlap in a day ?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

What can go through glass without breaking it?

What's the best place to go shopping in the ocean?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?