Which Burger Is Different in below image?

What came first, the chicken or the egg?

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

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

There was a strange boy who was born before his father. How can this be possible?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?