Easy Riddles and Answers

Question: Spell "Hard Water" using only 3 letters.

Question: You have 20 sick sheep, one dies. How many are left?

Question: There are 100 coins scattered in a dark room. 90 have heads facing up and 10 are facing tails up. You cannot tell which coins are which. How do you sort the coins into two piles that contain the same number of tails up coins?

Question: I can be used to build castles,
but I crumble in your hands.
I can help a man see,
and am found all around the lands.

What am I?

Question: You went into the forest and got me,
you sat down to find me,
you went home with me because you couldn't find me.

What am I?