If the end of the world should come on the first day of a new century, can you say what are the chances that it will happen on a Sunday?
Riddle AnswerMath Riddles
100 Using 4 Sevens
Can you take 4 7’s and arrange them with any math symbols needed to make the total be 100?
Riddle AnswerThe Two Aeroplanes
A man recently bought two aeroplanes, but afterwards found that they would not answer the purpose for which he wanted them. So he sold them for $600 each, making a loss of 20 percent on one machine and a profit of 20 percent on the other. Did he make a profit on the whole transaction, or a loss? And how much?
Riddle AnswerPainting the Lampposts
Tim and Pat were engaged by the local authorities to paint the lamp posts in a certain street. Tim, who was an early riser, arrived first on the job, and had painted three on the south side when Pat turned up and pointed out that Tim’s contract was for the north side.
So Tim started afresh on the north side and Pat continued on the south. When Pat had finished his side he went across the street and painted six posts for Tim, and then the job was finished.
There were an equal number of lamp-posts on each side of the street. Who painted more lamp posts, and how many more?
Riddle AnswerGetting Home with the Money
Johnny is walking home. He has $300 to bring home to his mom. While he is walking, a man stops him and gives him a chance to double his money.
The man says, “I’ll give you $600 if you can roll 1 die and get a 4 or above, you can roll 2 dice and get a 5 or 6 on at least one of them, or you can roll 3 dice and get a 6 on at least one die. If you don’t I get your $300.”
What does Johnny do to have the best chance of getting home with the money?
Riddle Answer