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The Most Difficult Tasks (page 24)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 231 to 240. |
Find number abc
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If 6ac53 + 6c7a6 = 12aa3b find number abc. Multiple solutions may exist. Calculate the number 1609
. Each of the numbers can be used only once.','/archive/2025/10/20/numbermania-1760918701.png','/calculate-the-number-1609/8515'))
NUMBERMANIA: Calculate the number 1609 using numbers [8, 4, 6, 1, 43, 789] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
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If 62a66 + a46cb = 13a42c find number abc. Multiple solutions may exist. 
A Meticulous Plan Goes Completely Wrong
A doctor at an insane asylum decided to take his patients to a baseball game.
For weeks in advance, he coached his patients to respond to his commands.
When the day of the game arrived, everything went quite well. As the national anthem started, the doctor yelled, “Up Nuts”, and the patients complied by standing up. After the anthem, he yelled, “Down Nuts”, and they all sat back down in their seats.
After a home run was hit, the doctor yelled, “Cheer Nuts” They all broke out into applause and cheered. When the umpire made a particularly bad call against the star of the home team, the Doctor yelled, “Booooo Nuts” and they all started booing and cat calling.
Comfortable with their response, the doctor decided to go get a beer and a hot dog, leaving his assistant in charge. When he returned, there was a riot in progress.
Finding his missing assistant, the doctor asked:” What in the world happened?”
The assistant replied: “Well everything was going just fine until this guy walked by and yelled, “PEANUTS!”
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/2025/10/18/mastermind-1760745901.png','/What-a-winning-combination/8513'))
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. 
Calculate the number 6332
. Each of the numbers can be used only once.','/archive/2025/10/17/numbermania-1760659501.png','/calculate-the-number-6332/8512'))
NUMBERMANIA: Calculate the number 6332 using numbers [9, 8, 4, 8, 39, 762] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. 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/2025/10/16/magic-square-1760573146.png','/MAGIC-SQUARE-Calculate-A-B-C/8511'))
The aim is to place the some numbers from the list (24, 25, 27, 29, 30, 32, 57, 66, 67, 69, 75) 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. 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/2025/10/09/magic-square-1759968327.png','/MAGIC-SQUARE-Calculate-A-B-C/8504'))
The aim is to place the some numbers from the list (2, 5, 6, 8, 17, 18, 20, 35, 36, 38) 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. Calculate the number 9167
. Each of the numbers can be used only once.','/archive/2025/10/06/numbermania-1759709101.png','/calculate-the-number-9167/8501'))
NUMBERMANIA: Calculate the number 9167 using numbers [3, 7, 9, 6, 41, 893] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Calculate the number 6370
. Each of the numbers can be used only once.','/archive/2025/10/03/numbermania-1759449902.png','/calculate-the-number-6370/8498'))
NUMBERMANIA: Calculate the number 6370 using numbers [2, 8, 2, 6, 15, 812] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. 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/2025/10/02/magic-square-1759363575.png','/MAGIC-SQUARE-Calculate-A-B-C/8497'))
The aim is to place the some numbers from the list (10, 11, 12, 20, 21, 22, 27, 32, 55, 56, 57, 72) 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. 
