Man of old, it is told would search until he tired,
not for gold, ne'er be sold, but what sought he was fire.
Man today, thou mayst say, has quite another aim,
in places deep, he did seek, to find me for his gain!
Answer: oil
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.