Can you solve these Brain Strains? 
  1. I Am Heavy And Hard To Pick Up, But Backwards I Am Not. What Am I?

  2. If You Have Me, You Want To Share Me. If You Share Me, You Don't Have Me. What Am I?

  3. A Red House Is Made From Red Bricks. A Blue House Is Made From Blue Bricks. A Yellow House Is Made From Yellow Bricks. What Is A Green House Made From?

  4. You're Escaping A Labyrinth, And There Are Three Exits. Exit A Leads To An Inferno. Exit B Leads To An Assassin. Exit C Leads To A Lion That Hasn't Eaten In Three Months. Which Exit Do You Pick?

 
 
Answers:-
A ton is equivalent to 2,000 pounds, but if you spell the word "ton" backwards you get N-O-T.
A secret
Glass
Exit C. If the lion hasn't eaten in three months, it definitely starved to death.