A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A man dies of old age on his 25 birthday. How is this possible?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

What is always in front of you but can’t be seen?

I shave every day, but my beard stays the same. What am I?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

What is the last thing you take off before bed?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?