BRAIN TEASERS
Math

Math

These are fun math riddles. All of these tricky riddles are based on real math concepts and can be solved with purely math and logic. These are the tasks listed 1 to 10.
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MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (4, 5, 11, 15, 16, 19, 20, 22, 26, 33, 40) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B-C.
Correct answers: 6
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #magicsquare
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How many 5-digit numbers (it...

How many 5-digit numbers (it cannot start with 0) are there that do not contain the numbers 3 and 5, and are multiples of 4?
Correct answers: 6
The first user who solved this task is Manguexa Wagle.
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#brainteasers #math #riddles
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Find number abc

If ccb0c - 5babc = 11cc0 find number abc. Multiple solutions may exist.
Correct answers: 9
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math

I want a boyfriend who

I want a who:
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Calculate 5555+6666

If 5763+2345=5363 and 8926+6213=4126 then 5555+6666=?
Correct answers: 12
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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Calculate the number 361

NUMBERMANIA: Calculate the number 361 using numbers [2, 8, 8, 3, 27, 312] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 9
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #numbermania
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Find number abc

If a66cb - 3c30c = 6b3c4 find number abc. Multiple solutions may exist.
Correct answers: 18
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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Calculate the number 1281

NUMBERMANIA: Calculate the number 1281 using numbers [2, 4, 1, 5, 72, 715] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 9
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A*B*C

The aim is to place the some numbers from the list (4, 7, 11, 12, 14, 19, 35, 47, 50, 55) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B*C.
Correct answers: 12
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #magicsquare
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Find number abc

If 8ca38 - bab3b = 28103 find number abc. Multiple solutions may exist.
Correct answers: 19
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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When Luke, the new kid, aske...

When Luke, the new kid, asked how old Annabelle was, she replied, ''In two years, I'll be twice as old as I was five years ago.'' How old is Annabelle?
Correct answers: 27
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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The aim is to place the some numbers from the list (4, 5, 11, 15, 16, 19, 20, 22, 26, 33, 40) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B-C.
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Johann von Lamont

Born 13 Dec 1805; died 6 Aug 1879 at age 73.Scottish-born German astronomer noted for discovering (1852) that the magnetic field of the Earth fluctuates with a 10.3-year activity cycle, but does not correlate it with the period of the sunspot cycle. From 1 Aug 1840, Johann von Lamont (as director of the Royal Astronomical Observatory in Munich) started regular and permanent observations of the earth's magnetic field. In the 1850's he started making regional magnetic surveys in the kingdom of Bavaria, later extended to other states in south Germany, France, Holland, Belgium, Spain, Portugal, Prussia and Denmark. His central European maps with isolines of geomagnetic elements, reduced to 1854, were the first worldwide.
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