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The Most Difficult Tasks (page 68)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 671 to 680. |
Find number abc
)
If b492c + 4ba50 = a8cac find number abc. Multiple solutions may exist. Correct answers: 1
#brainteasers #math
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/2026/08/27/magic-square-1787789144.png','/MAGIC-SQUARE-Calculate-A-B-C/8818'))
The aim is to place the some numbers from the list (1, 4, 5, 20, 21, 24, 25, 50, 53, 54, 81) 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 9acb5 + 9a603 = b9c3ba find number abc. Multiple solutions may exist. Correct answers: 1
#brainteasers #math
The psychiatrist was not expec...
The psychiatrist was not expecting the distraught stranger who staggered into his office and slumped into a chair. "You've got to help me. I'm losing my memory, Doctor," he sobbed. "I once had a successful business, a wife, home and family; I was a respected member of the community. But all that's gone now. Since my memory began failing, I've lost the business - I couldn't remember my clients' names. My wife and children have left me, too; and why shouldn't they - some nights I wouldn't get home until four or five in the morning. I'd forget where I lived...And it's getting worse. Doctor - it's getting worse!"
"This is not an unusual form of neurosis," the psychiatrist said soothingly. "Now tell me, just how long ago did you first become aware of this condition?"
"Condition?" The man sat up in his chair. "What condition?"
"This is not an unusual form of neurosis," the psychiatrist said soothingly. "Now tell me, just how long ago did you first become aware of this condition?"
"Condition?" The man sat up in his chair. "What condition?"
Calculate the number 1450
. Each of the numbers can be used only once.','/archive/2026/08/24/numbermania-1787529901.png','/calculate-the-number-1450/8815'))
NUMBERMANIA: Calculate the number 1450 using numbers [8, 5, 2, 3, 12, 737] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Correct answers: 1
#brainteasers #math #numbermania
Find number abc
)
If 576a5 + a1a56 = bb1c1 find number abc. Multiple solutions may exist. Correct answers: 1
#brainteasers #math
Find number abc
)
If 65c5b - b5ac3 = 3a50a find number abc. Multiple solutions may exist. Correct answers: 1
#brainteasers #math
Find number abc
)
If c9b81 + 9baca = 1ca8ab 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/2026/04/07/mastermind-1775520301.png','/Find-the-right-combination/8680'))
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
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/2026/04/04/mastermind-1775261101.png','/Find-the-right-combination/8677'))
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
What a winning 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/2026/03/31/mastermind-1774915501.png','/What-a-winning-combination/8673'))
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
