The Sphinx had eaten hundreds of people on their way to the city of Thebes, because they could not answer the riddle the cunning Sphinx had asked them.
"I will let you pass safely," the Sphinx said, "if you can answer my riddle."
The doctor is trying to solve many of the riddles of cancer.
How much we still have to pay for peace is a riddle.
This chapter will focus on the riddles of the planets.
Can you answer this riddle?
Oedipus had answered the riddle correctly!
Can you guess this riddle?
What is your riddle?
His voting record is riddled with contradictions.
Let's try to solve the riddle.
Don't leave the riddle.
If he could not answer the riddle, he would be eaten.