"Math Riddles"

father and son

The fathers age and his sons age added together are 66. The fathers age flipped is the sons age. What is the age of the father and his son?

A:
33

the cigars

Two fathers and two sons just closed a great deal and to celebrate, they go to the cigare store to buy some fine cuban cigars. However the store only has three cigars in stock, and yet they all leave with a cigare. How is this possible?

A:
There is a grandfather, a father and a son

Mind Bender 12

A singer has twice as mant pants as pairs of shoes in her wardrobe and three-halves as many t-shirts as pants. What is the least number of items she can have in her wardrobe in order to make a different shoes, pants, and T-shirt combinations for each day of the year. (Hint: Try using a tree diagram) Show All work.

A:
Let P=pants
S=shoes
T=T-shirts

three coins

you have three american coins and one of them is not a fifty cent pice, what are the coins?

A:
the coins are two quarters and a fifty cent peice...how can this be??? because the question said only one isnt a fifty cent peice so you have two other coins to chose from.

Which weighs more?

Which one weighs more a pound of feathers or a pound of bricks?

A:
They both weigh the same they are each a pound.

Do you know you math facts??

If  1=3, 2=4, 3=5, 4=2, 5=3 (and so on). What is 5 + 6= ?

A:
5 + 6
five six

=
seven

Two hospitals

A certain town is served by two hospitals. In the larger hospital, about 45 babies are born each day. In the smaller one, about 15 babies are born each day. Although the overall proportion of girls is about 50%, the actual proportion at either hospital may be greater or less on any day. At the end of a year, which hospital will have the greater number of days on which more than 60% of the babies born were girls?

A:
The answer is 2: the smaller hospital. The Law of Large Numbers says:

The more people we survey, the more accurate the result.

Larger samples are better.

In this case, the number of children born each day is a random sample of the number of children born in a year. There is much more deviation in a small (daily, in this case) sample than over an entire year. Similarly, there will be more deviation in a sample of size 15 than in one of size 45. Even though both hospitals will have about 50% girls over the year, the smaller hospital will have more days in which the number is higher than 60% (and more days when it is less than 40%). (Consider the extreme case of a hospital that has one baby a day. Every day will be either more than 60% girls (one) or less than 40% girls (zero).

People commonly and mistakenly believe that even very small samples will have the same composition as large ones. Remember this next time someone uses a small survey sample to "prove" something -- the results may be invalid!

Crushed fly

Two trains 200 miles apart are moving toward each other; each one is going at a speed of 50 miles per hour. A fly starting on the front end of one of them flies back and forth between them at a rate of 75 miles an hour. It does this until the trains collide and crush the fly to death. What is the total distance the fly has flown?

A:
Since the trains are 200 miles apart and each train is going at 50 miles an hour, it takes 2 hours for the trains to collide. Therefore the fly was flying for 2 hours. Since the fly was flying at the rate of 75 miles per hour, then the fly must have flown 150 miles.

Blue, red, green

Use arithmetic logic to solve the following problem: There are a mixture of red, green and blue balls in a bag. The total number of balls is 60. There are four times as many red balls as green balls; and 6 more blue balls than green balls. How many balls of each color are there?

A:
Blue = 15
Rred = 36
Green = 9

Juggling the jugs

If you want to measure out exactly one pint of water, and you have only a three pint jug and a five pint jug. How would you do it?

A:
Fill the three pint jug with water and pour it into the five pint jug. Then fill the three pint jug with water once again, and pour it into the five pint jug until it is completely full. The water remaining in the three pint jug is one pint.
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