MATH BRAIN TEASERS

Fun Facts (Hints)

Mathematics has an extensive history in just about every culture or civilized society known to man. Listed below are some cool facts to get those math juices flowing:
  • In 1852 mathematician JJ Sylvester established the "theory of algebraic invariants."
  • In 1995 math great Andrew Wiles, proved "Fermat's Last Theorem."
  • The first decimal number system is said to have been invented in Ancient Egypt around 5000BC.
  • The Ancient Mayan civilization located in Central America is one of the only cultures in the recorded history of the world to use a place-value number system.
  • The American Mathematical Society was formed in the late months of 1888 in New York.
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    Riddles and Answers © 2019

    Missing Dollar Riddle

    Hint: Make a list of all of the people involved and how much money they ended up with/spent.
    The $9 paid by each guest accounts for the $2 that went to the bellhop. So rather than adding $27 to the $2 kept by the bellhop, the $27 accounts for the bellhops money. The $27 plus the $3 kept by the guests does add up to $30.
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    Carton Of Eggs Riddle

    Hint:
    5 eggs are taken by the first 5 people, then the 6th person takes the egg , while its still in the carton!!
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    Finding The Angles

    Hint:
    47

    Explanation:
    At first look, it seems pretty easy but on the contrary, it is pretty tricky a question. So let us simplify it by dividing the triangle into three equal triangles (the triangles so formed if outer side is connected to the center of the circle) and then count the number of triangles in each part by taking two or more parts together.

    First, let us take the triangles in one part. There are 4 non-overlapping and 3 overlapping triangles.
    4 + 3 = 7
    7 * 3 = 21

    Next, if we take number of triangles by taking two parts together, there are 8 in total.
    8 * 3 = 24

    Lastly, the number of triangles if all three parts are taken together, there are a total of 2.

    21 + 24 + 2 = 47.
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    Finding The Value Riddle

    Hint:
    Horse = 10
    Cowboy-Boot = 1
    HorseShoe= 2
    The Last equation = 21

    Detailed Explanation :
    Equation1:
    3Horse = 30
    => Horse = 10 .....(1)

    Equation2:
    1Horse + 2HorseShoe + 2HorseShoe = 18
    10 + 4HorseShoe =18
    HorseShoe = 2 .....(3)

    Equation3:
    2HorseShoe - 2Cowboy-Boot = 2
    4 - 2Cowboy-Boot = 2
    => Cowboy-Boot = 1 ... (2)

    Equation4:
    Cowboy-Boot+Horse*HorseShoe = 1+10*2
    =>21
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    Joe's 10 Coins Riddle

    Hint:
    A half-dollar, a quarter, four dimes, and four pennies.
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    Bat And Ball Riddle

    Hint: The answer isn't 10 cents.
    Here's the solution:

    Although $1.00 + $0.10 does equal $1.10, if you take $1.00 $0.10 you get $0.90, but the problem requires that the bat costs $1 more than the ball.

    So, the ball must cost $0.05, and the bat must cost $1.05 since $1.05 + $0.05 = $1.10

    ---

    Still not convinced? You can use algebra to solve the problem:

    First, lets set up the equation:

    x + ($1.00 + x) = $1.10

    $1.00 + 2x = $1.10

    2x = $1.10 $1.00

    2x = $0.101

    Finally, solve for x:

    x = $0.05

    Check your work:

    x + ($1.00 + x) = $1.10, so

    $0.05 + ($1.00 + $0.05) = $1.10
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    At The Hardware Store Riddle

    Hint:
    Prices quoted were for house numbers at 12 cents per number. A number'6' cost me 12 cents.
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    Magic Word Riddle

    Hint: Count the letters. The number of letters in each individual word make up an important number.
    Pi (number of letters in each word of the riddle)
    3,1 4 1 5 9
    2 6 5 3 5 8
    9 7 9
    3 2 3 8 4 6
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    Combination Value Riddle

    Hint:
    A = 1
    B = 7
    C = 4
    D = 16
    E = 14
    F = 5
    G = 9
    H = 21
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    Running Hot And Cold

    Hint:
    Blood
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