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?

Why 1729 is a magic number? Answer Logically.

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

One day Jenifer meets the Lion and the Tiger in the Forest of Forgetfulness. She knows that the Lion lies on Mondays, Tuesdays, and Wednesdays, and tells the truth on the other days of the week. The Tiger, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Jenifer:

Lion: Yesterday was one of my lying days.

Tiger: Yesterday was one of my lying days too.

What day is it?

Can you count the number of triangles in the given figure?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Find the smallest sentence with all the English alphabet.

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

Spot what is wrong here in below Picture?