Which alphabet is a part of our body?

How can a man go eight days without sleep?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

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?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

What is the last thing you take off before bed?

A sundial has the fewest moving parts of any timepiece. Which has the most?

What word is represented by this rebus?

What does this mathematical rebus means ?

What can go up a chimney down, but can’t go down a chimney up?