BRAIN TEASERS
The Easiest Tasks (page 581)

The Easiest Tasks (page 581)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 5801 to 5810.
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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: 10
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #magicsquare
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Calculate the number 534

NUMBERMANIA: Calculate the number 534 using numbers [9, 6, 9, 8, 73, 110] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
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 (1, 3, 5, 9, 13, 15, 17, 49, 51, 53) 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: 10
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare

Did I say he was dead?

A 60-year-old man went to a doctor for a check-up. The doctor told him, "You're in terrific shape. There's nothing wrong with you. Why, you might live forever; you have the body of a 35-year-old. By the way, how old was your father when he died?"

The 60-year-old responded, "Did I say he was dead?"

The doctor was surprised and asked, "How old is he and is he very active?"

The 60-year-old responded, "Well, he is 82 years old and he still goes skiing three times a season and surfing three times a week during the summer."

The doctor couldn't believe it! So he said, "Well, how old was your grandfather when he died?"

The 60-year-old responded again, "Did I say he was dead?"

The doctor was astonished. He said, "You mean to tell me you are 60 years old and both your father and your grandfather are alive? Is your grandfather very active?"

The 60-year-old said, "He goes skiing at least once a season and surfing once a week during the summer. Not only that," said the patient, "my grandfather is 106 years old, and next week he is getting married again."

The doctor said, "At 106 years why on earth would your grandfather want to get married?"

His patient looked up at the doctor and said, "Did I say he wanted to?"

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Calculate the number 721

NUMBERMANIA: Calculate the number 721 using numbers [2, 4, 2, 7, 49, 231] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 668

NUMBERMANIA: Calculate the number 668 using numbers [9, 7, 8, 3, 76, 320] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 1019

NUMBERMANIA: Calculate the number 1019 using numbers [9, 3, 4, 9, 95, 866] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
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 (7, 8, 9, 11, 12, 13, 25, 36, 69, 70, 71, 82, 83) 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: 10
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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Calculate the number 2230

NUMBERMANIA: Calculate the number 2230 using numbers [8, 2, 9, 5, 62, 673] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 6336

NUMBERMANIA: Calculate the number 6336 using numbers [4, 8, 4, 7, 96, 709] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 8815

NUMBERMANIA: Calculate the number 8815 using numbers [6, 6, 1, 7, 31, 739] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania
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Edison patents

In 1890, Thomas A. Edison was granted U.S. patent No. 437422 for telegraphy, Nos. 437423,-4,-6 for a phonograph; No. 437425 for a phonograph-recorder; No. 437427 for a "Method of Making Phonograph Blanks"; No. 437428 for a "Propelling Device for Electrical Cars"; and No. 437429 for a phonogram blank.[Image: detail from Patent No. 437422.]
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