Riddle: My first is a fluid, my second a solid, my whole a plant. What is it?
Answer: Liquorice.
Riddle: A train just leaves a station and enters a tunnel. Where is the best place for a claustrophobic person to sit?
Answer: In the back. See, the train is still accelerating as it is leaving the station so the train will be moving faster when the back of the train enters the tunnel.
Riddle: What word is spelled the same way front and backward?
Answer: Racecar is racecar backwards.
What is it Riddles
Riddle: It has rib bones and back bones. It swallows human beings whole, then spits them out alive. What is it?
Answer: A house.
Riddle: The following numbers share a unique property: 1691, 1961, 6009, 6119, 6699, 6889, 8118. What is it?
Answer: Each number reads the same when viewed upside down.
What is it Riddles
Riddle: What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
Answer: The Letter J.
Riddle: Many things can create one, it can be of any shape or size, it is created for various reasons, and it can shrink or grow with time. What is it?
Answer: A Hole
What is it Riddles
Riddle: As a whole, I am both safe and secure. Behead me, and I become a place of meeting. Behead me again, and I am the partner of ready. Restore me, and I become the domain of beasts. What am I?
Answer: Stable.
Riddle: As a whole, I am both safe and secure. Behead me, and I become a place of meeting. Behead me again, and I am the partner of ready. Restore me, and I become the domain of beasts. What am I?
Answer: A Stable
Riddle: What word starting with BR, that with the addition of the letter E, becomes another word that sounds the same as the first?
Answer: Braking becomes Breaking.
Riddle: Whoever makes it, tells it not. Whoever takes it, knows it not. And whoever knows it wants it not. What is it?
Answer: Counterfeit money.
Riddle: Where is there no south, west, nor east, and weather is not fit for man or beast?
Answer: The South Pole.
Riddle: The answer I give is yes, but what I mean is no. What was the question?
Answer: Do you mind?
Riddle: What is that which goes with a carriage, comes with a carriage, is of no use to a carriage, and yet the carriage cannot go without it. What is it?
Answer: Noise.
Riddle: If you can buy 1 for $1, 14 for $2, and 145 for $3, what are you buying?
Answer: House numbers
Riddle: The land was white the seed was black It'll take a good scholar to riddle me that. What am I?
Answer: An eye or an eyeball
Riddle: Who spends the day at the window, goes to the table for meals and hides at night?
Answer: A fly.
Riddle: Pregnant every time you see her, yet she never will give birth. What is it?
Answer: Full Moon
Riddle: What three letters change a girl into a woman?
Answer: Replace the letters G, I, and R with the three letters A, D, and Y.  The word "lady" is another word for woman. Other possible answers: AGE, MRS, MOM...
Riddle: What goes through the door without pinching itself, sits on the stove without burning itself, sits on the table, and is not ashamed?
Answer: The Sun.