BRAIN TEASERS
The Most Difficult Tasks (page 124)

The Most Difficult Tasks (page 124)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1231 to 1240.
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (4, 5, 13, 25, 26, 34, 65, 66, 68, 74, 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: 2
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#brainteasers #math #magicsquare
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Calculate the number 399

NUMBERMANIA: Calculate the number 399 using numbers [4, 2, 7, 4, 22, 670] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania
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Calculate the number 1906

NUMBERMANIA: Calculate the number 1906 using numbers [2, 4, 2, 2, 48, 977] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania

Lightbulb Joke Collection 54

Q: How many post-doctoral fellows does it take to change a lightbulb?
A: One, but it'll probably take three or four tries to get it right because he/she will probably give it to the technician to do.
Q: How many graduate students does it take to screw in a light bulb?
A: Only one, but it may take upwards of five years for him to get it done.
Q: How many graduate students does it take to screw in a light bulb?
A: It all depends on the size of the grant.
Q: How many graduate students does it take to screw in a light bulb?
A: Two and a professor to take credit.
Q: How many graduate students does it take to screw in a light bulb?
A: 1/100. A graduate student needs to change 100 lightbulbs a day.
Q: Do you know how many musicians it takes to change a light bulb?
A: Twenty. One to hold the bulb, two to turn the ladder, and seventeen in on the guest list.
Q: Do you know how many musicians it takes to change a light bulb?
A: Five. One to screw in the light bulb and four to stand around and say, "Man, if I'd had his studio time, I could have done that."
Q: Do you know how many musicians it takes to change a light bulb?
A: 5, one to change the bulb and 4 to get in free because they know the guy who owns the socket.
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Calculate the number 7594

NUMBERMANIA: Calculate the number 7594 using numbers [8, 2, 6, 4, 40, 744] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 7273

NUMBERMANIA: Calculate the number 7273 using numbers [8, 7, 7, 7, 94, 954] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 2286

NUMBERMANIA: Calculate the number 2286 using numbers [1, 9, 3, 4, 81, 190] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania
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Calculate the number 1383

NUMBERMANIA: Calculate the number 1383 using numbers [2, 9, 3, 6, 44, 570] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania
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Calculate the number 7790

NUMBERMANIA: Calculate the number 7790 using numbers [7, 9, 9, 4, 81, 881] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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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 (6, 8, 9, 10, 12, 13, 16, 18, 19, 70, 87) 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: 2
CHECK ANSWER
#brainteasers #math #magicsquare
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Calculate the number 2206

NUMBERMANIA: Calculate the number 2206 using numbers [7, 2, 9, 8, 20, 128] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania
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Robert Fitzroy

Born 5 Jul 1805; died 30 Apr 1865 at age 59. English naval officer, hydrographer and meteorologist who commanded the voyage of HMS Beagle, aboard which Charles Darwin sailed around the world as the ship's naturalist. That voyage provided Darwin with much of the material on which he based his theory of evolution. Fitzroy retired from active duty in 1850 and from 1854 devoted himself to meteorology. He devised a storm warning system that was the prototype of the daily weather forecast, invented a barometer, and published The Weather Book (1863). His death was by suicide, during a bout of depression.
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