Math Riddle: A man told his son that he would give him $1000 if he could accomplish the following task. The father gave his son ten envelopes and a thousand dollars, all in one-dollar bills. He told his son,
“Place the money in the envelopes in such a manner that no matter what number of dollars I ask for, you can give me one or more of the envelopes, containing the exact amount I asked for without having to open any of the envelopes. If you can do this, you will keep the $1000.” When the father asked for a sum of money, the son was able to give him envelopes containing the exact amount of money asked for. How did the son distribute the money among the ten envelopes?
Answer: The contents or ten envelopes (in dollars) are as follows: $ 1, 2, 4, 8, 16, 32, 64, 128, 256, 489.
The first nine numbers are in geometric progression and their sum is deducted From 1,000, we arrive at the contents of the tenth envelope.
Math Riddle: Robert and David were preparing to have a water balloon fight. “No Fair” cried Robert, “You have 3 times as many as I do!” David said “Fine!” and gave Robert 10 more balloons. “Still not fair!” argued Robert,
“You still have twice as many as I do.” How many more balloons must David give Robert for them to have the same number?
Answer: David has to give Robert 20 more water balloons and give the 60s each. Robert started with 30 water balloons and David 90.
Riddle: If it is 1,800 kilometers to America, 1,200 kilometers to Japan, 2,400 kilometers to New Zealand, and 1,400 kilometers to Brazil-
How far is Morocco?
Solution: The correct answer is 1700 kilometers. How?
Vowels in countries’ names are worth 300 kilometers and consonants are worth 200 kilometers.
Then Morocco: 200+300+200+300+200+200+300 = 1700 kilometers
Math Riddle: Can you divide the watch face with 2 straight lines so that the sums of the numbers in each part are equal?
Answer: The sum of the numbers on the watch face is 78. If the two lines cross, there must be 4 equal parts, but 78 is not divisible by 4.
Then the lines do not cross, giving three parts with the sum of 26 each. Once you see the pairs on the face that add to 13(12+1,11+2, and so far) the answer will be easy to find.
Riddle: How many cats are in a small room if in each of the four corners a cat is sitting, and opposite each cat there sit three cats, and each cat’s tail another is sitting?
Answer: The correct answer is Four cats.
Each near a tail of a cat in an adjacent corner.
Riddle: An alarm clock runs 4 minutes slow every hour. It was set right 3 1/2 hours ago. Now another clock which is correct shows noon.
In how many minutes, to the nearest minutes, to the nearest minute, will the alarm clock show noon?
Answer: In 3 1/2 hours, the alarm clock has become 14 minutes slow. At noon the alarm clock will fall behind approximately an additional minute.
Its hands will show noon in 15 minutes.
Math Riddle: Mr. and Mrs. Smith were walking home from the shopping mall with their purchases when Mr. Smith began to complain that his load was too heavy. Mrs. Smith turned to her husband and said, “I don’t know what you’re complaining about because if you gave me one of your parcels, I would have twice as many as you and if I gave you just one of mine, we would have equal loads.” How many parcels was each carrying?
Answer: The correct answer is Mrs. Smith was carrying seven parcels and Mr. Smith was carrying five.