I have eight fingers and two thumbs but I do not live. What Am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

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

Why 1729 is a magic number? Answer Logically.

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

When we see 2 but call 10?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

Solve the rebus riddle in the picture below.

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?