Math Riddles

 
Popular
Daily Shuffle
New
Hard

2k views
165 ratings
18 saves

Question: Queens can move horizontally, vertically and diagonally any number of spaces as illustrated. One piece 'attacks' another if it moves to the same tile that the other piece is on. How can you arrange eight queens on the board so they cannot attack each other?

Hint: Four must go on black and four on white.

Answer: Here are the two solutions. This is usually solved with guess and check although using logic may be faster. We know that each queen must be in it's own row vertically and horizontally. We also know that 4 of the queens must be on white and 4 on black. This is true because with 4 queens on the same color all of the rest of that color is venerable to attack. (It could be done with math).

Share this:FacebookTwitterGoogle+

50.7k views
48 ratings
2 saves

Question: When is 1500 plus 20 and 1600 minus 40 the same thing?

Answer: Military time.

Share this:FacebookTwitterGoogle+

50.6k views
47 ratings
0 saves

Question: A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

Answer: The deaf and mute man gave him four quarters, so the man in the booth knew he wanted several tickets. Otherwise, he would have given him two quarters. This would work with any change equaling 50 cents.

Share this:FacebookTwitterGoogle+

36.6k views
41 ratings
0 saves

Question: You have an 8 by 8 chess board that has two corner squares diagonal from each other removed. Is there any way to place 31 dominoes of size 2x1 to cover the remaining 62 spaces?

Answer: No. When you remove the two diagonal spaces from the chess board they are both black or both white, making it so that there are two more of the other color. Each domino would cover 1 black and 1 white space. So 31 of them would have to cover 31 white spaces and 31 black spaces but with the corners removed there are 30 of one color and 32 of the other.

Share this:FacebookTwitterGoogle+

94.5k views
119 ratings
4 saves

Question: An ant gets onto one end of a tight rope that is 1 meter long. The ant is traveling at 1 centimeter per second, but the entire rope is being stretched an extra 1 meter (1,000 centimeters) a second (it can be stretched forever).

Will the ant ever reach the other end of the rope?

Answer: He will reach the end of the rope eventually. Once he gets onto the rope, the rope behind him also stretches, so this must also be accounted for.

Share this:FacebookTwitterGoogle+

Submit Your Riddle

Follow Us

Follow us and get the Riddle of the Day, Joke of the Day, and interesting updates.

Advertise with us!

© 2013-2014 Good Riddles Now. All rights reserved.

FacebookTwitterGoogle+RSS Feed