Brain teasers that will leave you stumped

What makes this number unique: 8,549,176,320?

Answer: It has each number, zero through nine, listed in alphabetical order.

These brain games will help sharpen your mind—how many can you complete?

Arnold Schwarzenegger has a long one. Michael J. Fox has a short one. Madonna does not use hers. Bill Clinton always uses his. The Pope never uses his. What is it?

Answer: Their surname.

Put a coin into an empty bottle and insert a cork into the neck. How can you remove the coin without removing the cork or breaking the bottle?

Answer: Push the cork down into the bottle. Then shake the coin out.

Find a number less than 100 that is increased by one-fifth of its value when its digits are reversed.

Answer: 45 (1/5 of 45 = 9, 9 + 45 = 54).

Challenge yourself with these 16 maths riddles only the smartest can get right.

Four cars come to a four-way stop, all coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. They do not crash into each other, but all four cars go. How is this possible?

Answer: They all made right-hand turns.

An Arab sheik is old and must leave his fortune to one of his two sons. He makes a proposition: Both sons will ride their camels in a race, and whichever camel crosses the finish line LAST will win the fortune for its owner. During the race, the two brothers wander aimlessly for days, neither willing to cross the finish line. In desperation, they ask a wise man for advice. He tells them something; then the brothers leap onto the camels and charge toward the finish line. What did the wise man say?

Answer: The rules of the race were that the owner of the camel that crosses the finish line last wins the fortune. The wise man simply told them to switch camels.

Only 2 Percent of People Can Solve Einstein’s Riddle—Can You?

What is unusual about the following words: revive, banana, grammar, voodoo, assess, potato, dresser, uneven?

Answer: Take the first letter of each word and place it at the end. It will spell the same word backward.

Here are 13 funny palindrome sentences that will crack you up.

Fourteen of the kids in the class are girls. Eight of the kids wear blue shirts. Two of the kids are neither girls or wear a blue shirt. If five of the kids are girls who wear blue shirts, how many kids are in the class?

Answer: 19.

Try these long riddles to give your brain a workout.

What letter comes next in the following sequence? D R M F S L T_

Answer: D—each letter represents one note in the diatonic musical scale: Do, Re, Mi, Fa, Sol, La, Ti, Do.

It’s not easy to figure out who’s who when the Brewer family gets together. The brother of Nick’s uncle Manny is named Mark. Lisa’s grandparents are Nick’s parents. Mark is married to Lisa’s grandma. The children of Angela’s daughter Sandra are named Lisa and Sasha. So who is Angela’s brother-in-law?

Answer: Manny is Angela’s brother-in-law.

Enjoy these 12 logic puzzles that will test your smarts.