Riddle: Adored by few, Feared and hated by many. Mistress of the entire universal reason, Master in the art of numbers. Some may have solved many of your mysteries, But there still much of them to find. What are they?
Answer: Mathematics.
Riddle: 'Tis found in our troubles, 'tis mixed with our pleasures, 'Tis laid up above with our heavenly treasures; 'Tis whispered in heaven, and 'tis muttered in hell, And it findeth a place in each sybilline spell; In Paradise nestled, 'mid Eden's fair flowers, It has sported with Eve in rose-perfumed bowers; 'Tis muttered in curses, yet breathed in our prayers; From the path of our duty it tempts us in snares. Deep, deep in our hearts you will find it engraved; Though in misery sunk, yet from sin it is saved. 'Tis found in the stream that flows on to the ocean; Though in bustle forever, 'tis ne'er in commotion. 'Tis wafted afar o'er the land in each breath; In the grave 'tis decaying-you'll find it in death. It is floating away on the broad stream of time, Yet it findeth a place in eternity's clime. In the legends of nations it holdeth a place; There's no charm without it to the beautiful face. In thunder you'll hear it, if closely you listen; In moonbeam and sunbeam forever 'twill glisten. In the dew-drop it sparkles; 'tis found in the forest; It whispers in peace when our need is the sorest. What am I?
Answer: The letter E.
Riddle: You can see me in water, but I never get wet. What am I?
Answer: A reflection.
Riddle: A plane crashed and every single person on board this flight was killed, yet, there were survivors. Explain how?
Answer: The married people lived; the singles died.
Riddle: I'm always in charge, I'm never in debt. I'm known as the first amongst all my kind. I'm found within cars, But never in buses. I'm not used in Mexico, I'm used in Palestine. What am I?
Answer: The letter A.
Riddle: I can kill people, but without me there would be no people. I was born long ago and will someday die. I can cause fire and am a magician with water. I have more brothers than any person. There is very little that can stop me. What am I?
Answer: A celestial body.
Riddle: I have endless make-overs but I never know my look. I can make any dull room bright. What am I?
Answer: A painted wall.
Riddle: Even if they are starving, natives living in the Arctic will never eat a penguin's egg. Why not?
Answer: Penguins only live in Antarctica.
Riddle: If the day before yesterday is the 23rd, then what is the day after tomorrow?
Answer: The 27th. The day before yesterday is the 23rd.  Therefore, yesterday was the 24, today is the 25th, tomorrow would be the 26th and the day after tomorrow would be 27th.
Riddle: A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations. What is it?
Answer: War.