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The Most Difficult Tasks (page 20)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 191 to 200. |
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/2026/02/12/magic-square-1770854745.png','/MAGIC-SQUARE-Calculate-A-B-C/8627'))
The aim is to place the some numbers from the list (15, 16, 19, 32, 33, 36, 44, 69, 70, 73, 78) 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: 0
#brainteasers #math #magicsquare
Find number abc
)
If b0a78 + 6ac66 = 110cbb find number abc. Multiple solutions may exist. Correct answers: 0
#brainteasers #math
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/2026/02/10/mastermind-1770681901.png','/What-a-winning-combination/8625'))
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: 0
#brainteasers #mastermind
Professional Worrier
David had been extremely anxious for years. It got to the point where his compulsive worrying was ruining his life, so he went to a psychiatrist, who recommended that David hire a professional worrier.
After he'd been working with the specialist for a few months, David's friend John noticed a change. "What happened?" John asked. "You don't worry about anything anymore."
"I hired a professional worrier!" David answered.
"That must cost a fortune," John said.
"Yes, he charges $3,000 a month," David said sheepishly.
"Three thousand dollars! How can you ever afford to pay him?" John exclaimed.
"I don't know," David said. "That's his problem."
After he'd been working with the specialist for a few months, David's friend John noticed a change. "What happened?" John asked. "You don't worry about anything anymore."
"I hired a professional worrier!" David answered.
"That must cost a fortune," John said.
"Yes, he charges $3,000 a month," David said sheepishly.
"Three thousand dollars! How can you ever afford to pay him?" John exclaimed.
"I don't know," David said. "That's his problem."
Calculate the number 1603
. Each of the numbers can be used only once.','/archive/2026/02/09/numbermania-1770595501.png','/calculate-the-number-1603/8624'))
NUMBERMANIA: Calculate the number 1603 using numbers [2, 9, 2, 4, 15, 254] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Correct answers: 0
#brainteasers #math #numbermania
Find number abc
)
If 9c8c9 + a8025 = ba590a find number abc. Multiple solutions may exist. Correct answers: 0
#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/2026/02/07/mastermind-1770422701.png','/Which-is-a-winning-combination-of-digits/8622'))
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: 0
#brainteasers #mastermind
Calculate the number 352
. Each of the numbers can be used only once.','/archive/2026/02/06/numbermania-1770336301.png','/calculate-the-number-352/8621'))
NUMBERMANIA: Calculate the number 352 using numbers [7, 1, 3, 5, 14, 847] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Correct answers: 0
#brainteasers #math #numbermania
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/2026/02/05/magic-square-1770249974.png','/MAGIC-SQUARE-Calculate-A-B-C/8620'))
The aim is to place the some numbers from the list (13, 16, 24, 29, 32, 36, 40, 61, 70, 73, 81, 93) 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: 0
#brainteasers #math #magicsquare
Find number abc
)
If b710b + b153a = 1c8ba0 find number abc. Multiple solutions may exist. Correct answers: 0
#brainteasers #math
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/2026/02/03/mastermind-1770077101.png','/What-a-winning-combination/8618'))
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: 0
#brainteasers #mastermind
