I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Find the last number in the series below:

voN luJ yaM raM ---

How is a fly different from a mosquito?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

You need to move three matchsticks to form three squares. Can you do it?

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

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

A time long back, there lived a king who ruled the great kingdom of Trojan House. As a part of the renovation of the kingdom to meet future security needs, he asked his chief architect to lay down a new play in a manner that all of his 10 castles are connected through five straight walls and each wall must connect four castles together. He also asked the architect that at least one of his castles should be protected with walls. The architect could not come up with any solution that served all of King's choices, but he suggested the best plan that you can see in the picture below. Can you find a better solution to serve the king's demand?

What is harder to catch the faster you run?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?