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

What word does this rebus represent?

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Rearrange the letters in "new door" to make one word.

How many sides does a circle have?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Suppose you are a girl candidate and sitting in an interview. Suddenly the interviewer asks you, 'What if one morning you wake up and find out that you are pregnant?

How will you reply to such a question?

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

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

How can you tell a raw egg from a hard-boiled egg?