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 c7c44 - c4ca7 = b017 find number abc. Multiple solutions may exist.
Correct answers: 16
The first user who solved this task is Nílton Corrêa De Sousa.
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Calculate the number 6752

NUMBERMANIA: Calculate the number 6752 using numbers [6, 8, 4, 6, 41, 465] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 5
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #numbermania
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Find number abc

If 3ba38 - c645b = 1a581 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

Half sisters

One Sunday morning Joe burst into the living room and said: "Dad, Mom, I have some great news for you! I am getting married to the most beautiful girl in town. She lives a block away and her name is Susan."

After dinner, Joe's dad took him aside and said: "Son, I have to talk with you. Your mother and I have been married 30 years. She's a wonderful wife but she has never offered much excitement in the bedroom, so I used to fool around with women a lot. Susan is actually your half-sister, and I'm afraid you can't marry her."

Joe was heartbroken. After eight months he eventually started dating girls again. A year later he came home and very proudly announced: "Dianne said yes! We are getting married in June."

Again his father insisted on another private conversation and broke the sad news: "Diane is your half-sister too, Joe, I am very sorry about this."

Joe was furious. He finally decided to go to his mother with the news.

"Dad has done so much harm. I guess I am never going to get married," he complained. "Every time I fall in love, Dad tells me the girl is my half-sister."

His mother just shook her head and said: "Don't pay any attention to what he says, dear. He's not really your father."

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Calculate the number 1614

NUMBERMANIA: Calculate the number 1614 using numbers [6, 2, 6, 4, 23, 180] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nílton Corrêa 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 (4, 9, 12, 18, 19, 22, 28, 29, 32, 38, 80, 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: 9
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #magicsquare
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Find number abc

If a41ab - 83acb = 1b23b find number abc. Multiple solutions may exist.
Correct answers: 17
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math
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Calculate the number 1951

NUMBERMANIA: Calculate the number 1951 using numbers [5, 2, 1, 4, 26, 279] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #numbermania
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Find number abc

If 803bc - ac2ca = 3c1a1 find number abc. Multiple solutions may exist.
Correct answers: 21
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math
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Calculate the number 6942

NUMBERMANIA: Calculate the number 6942 using numbers [8, 5, 3, 7, 19, 524] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nílton Corrêa 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 (8, 9, 12, 31, 32, 35, 43, 44, 47, 77, 85) 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: 11
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #magicsquare
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If c7c44 - c4ca7 = b017 find number abc. Multiple solutions may exist.
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Frederick W. Taylor

Born 20 Mar 1856; died 21 Mar 1915 at age 59.Frederick Winslow Taylor was an American engineer and inventor who is known as the father of scientific management. His system of industrial management has influenced the development of virtually every country enjoying the benefits of modern industry. He introduced a scientific approach (1881) to “time and motion study”while chief engineer at Midvale Steel Company, Philadelphia, Pa. Taylor and his associates used stop-watches to time the laborers as they performed various tasks, counted the number of shovel-loads they each moved, and the load per shovel. Thus he was able to determine an optimum shovel size and length. Such careful observations, aimed at recognizing wasted effort and minimizing time used, increased the efficiency of actions of factory workers.
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