You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

Replace the question mark with the correct number in below Picture:

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Aaron, Brad, Christopher, Danny and Elvis decided to play a game of tiddlywinks. In this game they decided that one win will get 1 point for winning, 0 for losing and 1/2 in case of a tie.

They finished the game in alphabetical order and it was found that the scores were different for each person.

Based on the following two statements, can you find out the result of the individual games?
Brad: No one could finish like me, without a loss.
Elvis: No one played worse than me, I finished without a single win.

Do You See It?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Prove that the below maths equation is true.

8 + 8 = 91

Which Travels Faster? Solve below famous picture riddle: