I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Why do we preferably have round manhole covers and not square ones?

Which is faster, Heat or Cold ? Explain.

You bought me for dinner but never eat me. What am I?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?