BRAIN TEASERS
The Most Difficult Tasks (page 162)

The Most Difficult Tasks (page 162)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1611 to 1620.
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Calculate the number 4421

NUMBERMANIA: Calculate the number 4421 using numbers [7, 9, 6, 8, 24, 614] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania
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Calculate the number 7539

NUMBERMANIA: Calculate the number 7539 using numbers [5, 8, 2, 1, 65, 913] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is NĂ­lton CorrĂȘa de Sousa.
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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 (2, 3, 5, 7, 8, 10, 18, 19, 21, 28) 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.
CHECK ANSWER
#brainteasers #math #magicsquare

Todd Barry: Summer School

I never understood the concept of summer school. The teachers going to go up there and go, OK, class, you know that subject you couldnt grasp in nine months? Were going to whip it out in six weeks.
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MAGIC SQUARE: Calculate A+B*C

The aim is to place the some numbers from the list (2, 4, 12, 21, 23, 26, 30, 31, 64, 70, 72, 80, 90) 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.
CHECK ANSWER
#brainteasers #math #magicsquare
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Calculate the number 4402

NUMBERMANIA: Calculate the number 4402 using numbers [2, 6, 4, 6, 95, 346] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Thea Ferlazzo.
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#brainteasers #math #numbermania
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Calculate the number 2040

NUMBERMANIA: Calculate the number 2040 using numbers [1, 9, 2, 4, 55, 234] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A+B*C

The aim is to place the some numbers from the list (10, 12, 13, 24, 31, 33, 34, 67, 69, 70) 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.
CHECK ANSWER
#brainteasers #math #magicsquare
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Calculate the number 8692

NUMBERMANIA: Calculate the number 8692 using numbers [8, 1, 9, 7, 81, 478] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 3809

NUMBERMANIA: Calculate the number 3809 using numbers [2, 4, 8, 7, 69, 916] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (5, 21, 22, 24, 25, 29, 30, 31, 34, 39, 91) 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.
CHECK ANSWER
#brainteasers #math #magicsquare
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Rufus Henry Gilbert

Died 10 Jul 1885 at age 53 (born 26 Jan 1832).U.S. surgeon and inventor who played a major role in the development of rapid transit in New York City. After serving as a surgeon in the Federal Army in the Civil War, he became interested in rapid transit as a means of freeing people from living in the unhealthful, crowded tenements in the centres of large cities. Gilbert obtained two patents in 1870 on a pneumatic-tube system, and he incorporated the Gilbert Electric Railway Company on 17 Jun 1872, to build elevated lines in New York City. The cars were to be propelled by air pressure from pneumatic tubes mounted on the elevated structure. A financial depression delayed construction until 1876, and forced adoption of a conventional track with trains drawn by steam locomotives, which opened 6 Jun 1878.
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