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The Most Difficult Tasks (page 79)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 781 to 790. |
Find number abc
)
If b5a11 + bc385 = 1a959b find number abc. Multiple solutions may exist. Correct answers: 1
#brainteasers #math
Find the right combination
. 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.','/archive/2025/04/26/mastermind-1745625901.png','/Find-the-right-combination/8340'))
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: 1
#brainteasers #mastermind
Calculate the number 2153
. Each of the numbers can be used only once.','/archive/2025/04/25/numbermania-1745539501.png','/calculate-the-number-2153/8339'))
NUMBERMANIA: Calculate the number 2153 using numbers [2, 8, 9, 1, 82, 189] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Correct answers: 1
#brainteasers #math #numbermania
Buy Machine Factory
An American manufacturer is showing his machine factory to a potential customer from Albania. At noon, when the lunch whistle blows, two thousand men and women immediately stop work and leave the building.
"Your workers, they're escaping!" cries the visitor. "You've got to stop them."
"Don't worry, they'll be back," says the American. And indeed, at exactly one o'clock the whistle blows again, and all the workers return from their break.
When the tour is over, the manufacturer turns to his guest and says, "Well, now, which of these machines would you like to order?"
"Forget the machines," says the visitor. "How much do you want for that whistle?"
"Your workers, they're escaping!" cries the visitor. "You've got to stop them."
"Don't worry, they'll be back," says the American. And indeed, at exactly one o'clock the whistle blows again, and all the workers return from their break.
When the tour is over, the manufacturer turns to his guest and says, "Well, now, which of these machines would you like to order?"
"Forget the machines," says the visitor. "How much do you want for that whistle?"
MAGIC SQUARE: Calculate A+B+C
 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.','/archive/2025/04/24/magic-square-1745453143.png','/MAGIC-SQUARE-Calculate-A-B-C/8338'))
The aim is to place the some numbers from the list (23, 24, 25, 30, 31, 32, 46, 47, 48, 52, 73) 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
#brainteasers #math #magicsquare
Find number abc
)
If 55abb + 78174 = 1cc774 find number abc. Multiple solutions may exist. Correct answers: 1
#brainteasers #math
Which is a winning combination of digits?
. 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.','/archive/2025/04/22/mastermind-1745280301.png','/Which-is-a-winning-combination-of-digits/8336'))
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: 1
#brainteasers #mastermind
Calculate the number 3637
. Each of the numbers can be used only once.','/archive/2025/04/21/numbermania-1745193901.png','/calculate-the-number-3637/8335'))
NUMBERMANIA: Calculate the number 3637 using numbers [5, 5, 9, 8, 26, 431] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Correct answers: 1
#brainteasers #math #numbermania
Find number abc
)
If aa1aa + bc23a = 126b1b find number abc. Multiple solutions may exist. Correct answers: 1
#brainteasers #math
Find the right combination
. 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.','/archive/2025/04/19/mastermind-1745021101.png','/Find-the-right-combination/8333'))
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: 1
#brainteasers #mastermind
Calculate the number 2956
. Each of the numbers can be used only once.','/archive/2025/04/18/numbermania-1744934702.png','/calculate-the-number-2956/8332'))
NUMBERMANIA: Calculate the number 2956 using numbers [3, 5, 6, 8, 17, 598] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Correct answers: 1
#brainteasers #math #numbermania
