Can you replace the question mark with the correct number in the below table sequence?

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

John was piloting a plane behind a car but was never able to overtake it. Why?

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

What does below Rebus say?

XLR8

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

Replace the question mark with the correct number in the below-given picture?

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?

Which digit occurred maximum times between the number 1 and 1000?