Can you find a five letter word that is left with only two letters if one is removed?

Why do people go to bed?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Can you decipher the two rows to find the hidden word?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Using eight eights and addition only, can you make 1000?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.