How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

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?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

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

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

What has one eye, but can’t see?

You bought me for dinner but never eat me. What am I?