BRAIN TEASERS
The Most Difficult Tasks (page 90)

The Most Difficult Tasks (page 90)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 891 to 900.
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Find number abc

If c6411 + 1cb2b = 4a4c1 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 959

NUMBERMANIA: Calculate the number 959 using numbers [1, 5, 8, 1, 98, 857] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania
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Calculate the number 4964

NUMBERMANIA: Calculate the number 4964 using numbers [6, 5, 9, 3, 27, 922] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania

Childhood Sweethearts

An elderly couple who were childhood sweethearts had married & settled down in their old neighborhood.
To celebrate their 50th wedding anniversary they walk down to their old school. There, they hold hands as they find the desk they shared & where he had carved "I love you, Sally".
On their way back home, a bag of money falls out of an armoured car practically at their feet. She quickly picks it up, & they don't know what to do with it so they take it home. There, she counts the money, & its fifty-thousand dollars.
The husband says: "We've got to give it back".
She says, "Finders keepers" & puts the money back in the bag & hides it up in their attic.
The next day, two policemen are going from door-to-door in the neighbourhood looking for the money show up at their home.
One knocks on the door & says: "Pardon me, but did either of you find any money that fell out of an armoured car yesterday?"
She says: "No"..
The husband says: "She's lying. She hid it up in the attic."
She says: "Don't believe him, he's getting senile." 

But the policemen sit the man down & begin to question him.
One says: "Tell us the story from the beginning."
The old man says: "Well, when Sally & I were walking home from school yesterday ..."
At this, the policeman looks at his partner & says: "We're outta here ..."      

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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (13, 14, 16, 20, 21, 23, 42, 49, 50, 52, 58, 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: 1
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#brainteasers #math #magicsquare
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Find number abc

If 84bc5 + c26aa = 1aa0a2 find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
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Calculate the number 6715

NUMBERMANIA: Calculate the number 6715 using numbers [4, 9, 6, 8, 69, 567] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania
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Calculate the number 7649

NUMBERMANIA: Calculate the number 7649 using numbers [6, 6, 8, 9, 65, 505] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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, 18, 20, 23, 27, 29, 32, 39, 41, 43, 46, 74) 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: 1
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If c70bb + 9abbb = aa873c find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
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Calculate the number 3518

NUMBERMANIA: Calculate the number 3518 using numbers [3, 7, 4, 8, 24, 333] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania
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Heart surgery

In 1952, the first surgical operation in the U.S. to expose the heart's mitral valve for a prolonged time was undertaken by Dr Forest Dewey Dodrill at the Harper Hospital, Detroit, Mich. The patient, a 41-year-old man, was provided with The Michigan Heart as a substitute for the lower left ventricle.
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