Can you find a five letter word that is left with only two letters if one is removed?

Our product and our sum always give the same answer. Who are we?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

I always drive my customer away.

Who am I?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What brings you down but never up?

Can you find out which options fits best with the missing column?

Why Wine Glass Stem is so long?

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?