A precious stone, as clear as diamond.
Seek it out while the sun's near the horizon.
Though you can walk on water with its power,
try to keep it, and it'll vanish in an hour.
Answer: ice
Select a pack of riddles and try to solve it in an interesting way.
This riddle appears in the following downloadable PDF files:
Einstein said that only 2% of the world could solve this problem. Can you do it?
Complete the grid by using logic and the given clues of each problem.
Use logic deductions to solve problems that are similar to the Einstein's Riddle.