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?

What has 88 keys?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

How can you take 2 from 5 and leave 4?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

What has no start, end, or centre?