BRAIN TEASERS
The Most Difficult Tasks (page 207)

The Most Difficult Tasks (page 207)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 2061 to 2070.
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What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 930

NUMBERMANIA: Calculate the number 930 using numbers [3, 1, 3, 1, 18, 897] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania

Getting a Cake

Little Johnny walked into the kitchen, saw his mother making a cake and announced, "I'll be playing in my room for the next two hours. I sure would like a piece of cake when you're finished."
Later, when his mother brought him a piece of cooled cake, Little Johnny exclaimed, "Golly, it worked!"
Puzzled, his mother asked, "What do you mean?"
Little Johnny replied, "Daddy said that in order to get a piece around here, you have to spend a couple of hours playing first!"

Jokes of the day - Daily updated jokes. New jokes every day.
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What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (8, 11, 12, 19, 22, 23, 42, 45, 46, 54, 57) 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: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (11, 12, 17, 23, 24, 29, 50, 54, 55, 60) 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: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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Calculate the number 2430

NUMBERMANIA: Calculate the number 2430 using numbers [7, 1, 3, 7, 23, 284] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 14
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, 2, 12, 21, 22, 32, 40, 41, 51, 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: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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Calculate the number 3046

NUMBERMANIA: Calculate the number 3046 using numbers [2, 8, 1, 2, 48, 986] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 14
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, 17, 19, 20, 21, 22, 23, 33, 36, 37, 49) 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: 14
The first user who solved this task is NĂ­lton CorrĂȘa de Sousa.
CHECK ANSWER
#brainteasers #math #magicsquare
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The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
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Elias James Corey

Born 12 Jul 1928.American organic chemist, winner of the Nobel Prize for Chemistry in 1990 "for his development of the theory and methodology of organic synthesis." He is principally known for his work is in computer-aided analyses of synthesis problems. Using "retrosynthetic analysis," a target molecule might be broken down by reversible steps into simpler, readily available compounds, which is greatly assisted by the use of computers. Corey has synthesized over 100 substances for the first time, including terpenes (plant oil hydrocarbons) and ginkolide B (an extract from the ginko tree used to control asthma.)
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