BRAIN TEASERS
Math (page 223)

Math (page 223)

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 2221 to 2230.
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Find number abc

If 5a1c8 - 3a2bc = 1988c find number abc. Multiple solutions may exist.
Correct answers: 33
The first user who solved this task is Djordje Timotijevic.
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Calculate the number 1391

NUMBERMANIA: Calculate the number 1391 using numbers [2, 6, 2, 9, 65, 203] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 15
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 (1, 2, 6, 17, 18, 22, 29, 30, 34, 57, 74, 81) 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: 15
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #magicsquare

Life would be easier

Life would be easier if you could mark people as spam.
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Find number abc

If 57bab - 1c591 = 4c4a9 find number abc. Multiple solutions may exist.
Correct answers: 52
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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Calculate the number 4380

NUMBERMANIA: Calculate the number 4380 using numbers [9, 6, 1, 4, 39, 746] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 13
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 ac046 + cbac9 = 36a6b find number abc. Multiple solutions may exist.
Correct answers: 39
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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Calculate the number 2070

NUMBERMANIA: Calculate the number 2070 using numbers [7, 5, 6, 4, 93, 221] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 15
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 (9, 10, 18, 19, 22, 23, 31, 54, 55, 63) 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: 17
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #magicsquare
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What number comes next?

Look at the series (9, 73, 241, 561, 1081, 1849, ?), determine the pattern, and find the value of the next number!
Correct answers: 40
The first user who solved this task is Fazil Hashim.
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#brainteasers #math #riddles
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Find number abc

If 80b87 - cba67 = a71a0 find number abc. Multiple solutions may exist.
Correct answers: 48
The first user who solved this task is Djordje Timotijevic.
CHECK ANSWER
#brainteasers #math
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Jean-Gaston Darboux

Born 14 Aug 1842; died 23 Feb 1917 at age 74.French mathematician whose work on partial differential equations introduced a new method of integration (the Darboux integral) and contributed to infinitesimal geometry. He wrote a paper in 1870 on differential equations of the second order in which he presented the Darboux integral. In 1873, Darboux wrote a paper on cyclides and between 1887-96 he produced four volumes on infinitesimal geometry, including a discussion of one surface rolling on another surface. In particular he studied the geometrical configuration generated by points and lines which are fixed on the rolling surface. He also studied the problem of finding the shortest path between two points on a surface.«
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