What word of five letters

What word of five letters has only one left when two letters are removed? Check the answer here.

A six letter word

What English six letter word has its last three letters as the past tense of its first three letters? Check the answer here.

A word of three letters

I am a word of three letters. I am spelt the same backward and forward; turn me upside down, I will become your mother. What am I? Check the answer here.