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The Most Difficult Taskspuzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10. |
Find number abc
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If 98242 - 9bacc = 18b5 find number abc. Multiple solutions may exist. 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/2025/07/12/mastermind-1752278701.png','/What-a-winning-combination/8416'))
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 7453
. Each of the numbers can be used only once.','/archive/2025/07/11/numbermania-1752192301.png','/calculate-the-number-7453/8415'))
NUMBERMANIA: Calculate the number 7453 using numbers [1, 9, 9, 1, 22, 744] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. 
Bill & Moe
Bill and Moe had started with only five hundred dollars between them, but they had built up a computer business with sales in the millions. Their company employed over two hundred people, and the two executives lived like princes.
Almost overnight, things changed. Sales dropped sharply, former customers disappeared, the business failed, and personal debts forced both into bankruptcy. Bill and Moe blamed each other for the troubles, and they parted on unfriendly terms.
Five years later, Bill drove up to a decrepit diner and stopped for a cup of coffee. As he was discreetly wiping some crumbs from the table, a waiter approached. Bill looked up and gasped.
"Moe!" he said, shaking his head. "It's a terrible thing, seeing you working in a place as bad as this."
"Yeah," Moe said with a smirk. "But at least I don't eat here."
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/2025/07/10/magic-square-1752105939.png','/MAGIC-SQUARE-Calculate-A-B-C/8414'))
The aim is to place the some numbers from the list (9, 10, 13, 14, 18, 22, 50, 51, 52, 60, 63) 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. 
Find number abc
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If ab07c - c34cb = 4a6a2 find number abc. Multiple solutions may exist. 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/2025/07/08/mastermind-1751933101.png','/Which-is-a-winning-combination-of-digits/8412'))
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 1958
. Each of the numbers can be used only once.','/archive/2025/07/07/numbermania-1751846701.png','/calculate-the-number-1958/8411'))
NUMBERMANIA: Calculate the number 1958 using numbers [7, 4, 2, 5, 59, 512] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
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If 9b0a5 - 1bc0a = 79259 find number abc. Multiple solutions may exist. Calculate the number 4136
. Each of the numbers can be used only once.','/archive/2025/07/04/numbermania-1751587501.png','/calculate-the-number-4136/8408'))
NUMBERMANIA: Calculate the number 4136 using numbers [3, 6, 3, 4, 73, 763] 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/2025/07/03/magic-square-1751501139.png','/MAGIC-SQUARE-Calculate-A-B-C/8407'))
The aim is to place the some numbers from the list (3, 4, 6, 7, 8, 9, 10, 11, 14, 23, 27) 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. 
