Can you replace the question mark with the correct number?

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 am never scared but became petrified and can’t live in a house but would die to make one. What am I?

How can you tell a raw egg from a hard-boiled egg?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

Can you solve the maths in the below-given picture equation?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

Look at the picture and find out which square is not linked with any of the other squares.

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?