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 © 2017
    Math Brain Teasers
    Math brain teasers are awesome math questions and problems given to entertain us while at the same time giving us an education. Cognitive skills are vital to performing well in almost every activity that we participate in daily, especially in the math field.

    This collection compiled by our staff on a regular basis will provide you with a great way to workout that math brain power, and will hopefully benefit you in your studies.

    This is an awesome collection for anyone ages 5 and up, and contains a comprehensive set of riddles related to math for a wide range of audiences.

    How many of these convoluted math riddles do you think that you can solve? Try out our collection, and be sure to come back regularly to solve our newly added math brain teasers.

    Banana Clock Riddle

    Hint: 1. Look closely at the clock. 2. Number of Bananas. 3. Some thing regarding the sides of the Shapes figure.
    38

    Logic :
    From 1st the hexagon shape has value 15.
    The shape has 15 edges(6 of hexagon,5 of Pentagon and 4 of Square)
    From 2nd we get value of one bunch of bananas is 4.
    So each banana has value of 1.
    From 3rd we get that each clock has value of 3.
    Which resembles the time on the clock which is 3.
    Hence by using these insights, we get the last required values as
    Clock = 2 (2 in the clock)
    Bananas = 3 (3 bananas in the bunch)
    Hexagon = 11 (Hexagon[6 sides] and pentagon[5 sides], so 6+5=11)
    So required value is
    2+3+3x11=?
    2+3+33=? (Multiply first - Bodmas rule)
    5+33=38 and hence the answer is 38.
    Did you answer this riddle correctly?
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    Age Of Three Daughters Riddles

    Hint:
    3, 3, and 8. The only groups of 3 factors of 72 to have non-unique sums are 2 6 6 and 3 3 8 (with a sum of 14). The rest have unique sums:

    2 + 2 + 18 = 22
    2 + 3 + 12 = 18
    2 + 4 + 9 = 15
    3 + 4 + 6 = 13

    The house number alone would have identified any of these groups. Since more information was required, we know the sum left the answer unknown. The presence of a single oldest child eliminates 2 6 6, leaving 3 3 8 as the only possible answer.
    Did you answer this riddle correctly?
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    Bus Driver Riddle

    Hint:
    You are.
    Did you answer this riddle correctly?
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    Pearl Problems Riddle

    Hint: If you took out 2 pearls, you would have about a 50% chance of getting 2 gold bars. However, you can take even more pearls and still retain the 50% chance.
    Take out 5000 pearls. If the remaining pearl is white, then you've won 5000 gold bars!
    Did you answer this riddle correctly?
    YES  NO  

    Coconut Toll Booth Riddle

    Hint:
    1 10
    2 10
    3 9
    4 9
    5 9
    6 8
    7 8
    8 7
    9 7
    10 7

    200-84 = 116
    Did you answer this riddle correctly?
    YES  NO  

    Going To The Picnic

    Hint:
    2 people.

    It is stated clearly that Mr. and Mrs. Smith went for a picnic. It does not say that the others accompanied them.
    Did you answer this riddle correctly?
    YES  NO  

    The Weight Of A Melon Riddle

    Hint: We are to determine X the total mass of melon after the drying. The Dry weight, DW is 1lb both before and after the drying. The New Water weight, WNW is clearly X - DW or X - 1
    50 lbs.
    Did you answer this riddle correctly?
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    A Lady Steals $100

    Hint:
    The best answer from the choices is the owner lost $100. The $100 bill that was stolen was then given back to the owner. What the owner loses is the $70 worth of goods and the $30 in change, which makes for a total of $70 + $30 = $100. The owner has lost $100.

    Technically, the owner lost $30 plus the value, V, of the $70 of goods. Since stores typically sell goods at a markup, the value may be less than $70. But in the case of a loss leader, the owner may have lost more than $70.
    Did you answer this riddle correctly?
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    Prince Age Riddle

    Hint:
    Current Future Past

    Princess x 2z (x+y)/2
    Prince y x z

    I then created three equations, since the difference in their age will always be the same.

    d = the difference in ages

    x y = d
    2z x = d
    x/2 + y/2 z = d

    I then created a matrix and solved it using row reduction.

    x y z

    1 -1 0 d
    -1 0 2 d
    .5 .5 -1 d

    It reduced to:

    x y z

    1 0 0 4d
    0 1 0 3d
    0 0 1 5d/2

    This means that you can pick any difference you want (an even one presumably because you want integer ages).

    Princess age: 4d
    Prince age: 3d

    Ages that work

    Princess:
    4
    8
    16
    24
    32
    40
    48
    56
    64
    72
    80

    Prince:
    3
    6
    12
    18
    24
    30
    36
    42
    48
    54
    60
    Did you answer this riddle correctly?
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    2 4 12 48 240 Riddle

    Hint:
    240. To get the number, multiply the previous number in the series by its position. 48 is in the 5th position, so 48 � 5 = 240
    Did you answer this riddle correctly?
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    Post Your Math Brain Teasers Below

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