What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Which is heavier: a ton of bricks or a ton of feathers?

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?

Can you write down eight eights so that they add up to one thousand?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

What is more useful when it is broken?

What breaks yet never falls, and what falls yet never breaks?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What is the word or phrase?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?