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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Find number abc

If a274c - 79bc3 = 31a3 find number abc. Multiple solutions may exist.
Correct answers: 5
The first user who solved this task is Nasrin 24 T.
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Calculate the number 1271

NUMBERMANIA: Calculate the number 1271 using numbers [7, 2, 7, 3, 92, 938] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania
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Find number abc

If 9a7a9 - c5995 = 677bb find number abc. Multiple solutions may exist.
Correct answers: 9
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math

The people of Sommelie...

The people of Sommelier are wine-ing about the War on Terroir. They've reached a new Merlot. Personally, I no grigio with them: it's just sour grapes, with no rhyme or Riesling. What's the Gewürtz that can happen? 
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Calculate the number 3371

NUMBERMANIA: Calculate the number 3371 using numbers [4, 3, 9, 5, 67, 807] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 7
The first user who solved this task is Nasrin 24 T.
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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 (15, 17, 24, 28, 30, 37, 41, 43, 50, 60, 79) 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: 8
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #magicsquare
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Find number abc

If 55ab6 - c57aa = 40cb7 find number abc. Multiple solutions may exist.
Correct answers: 18
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Calculate the number 4300

NUMBERMANIA: Calculate the number 4300 using numbers [8, 9, 3, 7, 25, 442] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 5
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania
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Find number abc

If ab2cb + ba97a = 133232 find number abc. Multiple solutions may exist.
Correct answers: 17
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Calculate the number 671

NUMBERMANIA: Calculate the number 671 using numbers [1, 2, 7, 3, 93, 599] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 6
The first user who solved this task is Nasrin 24 T.
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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 (3, 6, 11, 21, 24, 29, 42, 48, 54, 58, 61, 66) 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: 5
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #magicsquare
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Charles-Eugène Delaunay

Died 5 Aug 1872 at age 56 (born 9 Apr 1816).French mathematician and astronomer whose theory of lunar motion advanced the development of planetary-motion theories. After 20 years of work, he published two volumes on lunar theory, La Théorie du mouvement de la lune (1860,1867). This is an important case of the three body problem. Delaunay found the longitude, latitude and parallax of the Moon as infinite series. These gave results correct to 1 second of arc but were not too practical as the series converged slowly. However this work was important in the beginnings of functional analysis. Delaunay succeeded Le Verrier as director of the Paris Observatory in 1870 but two years later he and three companions drowned in a boating accident.
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