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The Most Difficult Taskspuzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10. |
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/2026/08/11/mastermind-1786406702.png','/Find-the-right-combination/8802'))
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 3235
. Each of the numbers can be used only once.','/archive/2026/08/10/numbermania-1786320301.png','/calculate-the-number-3235/8801'))
NUMBERMANIA: Calculate the number 3235 using numbers [2, 5, 9, 6, 27, 564] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
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If 33aa9 + 2cbc3 = 554b2 find number abc. Multiple solutions may exist. 
Breaking The Silence
Brother John entered the 'Monastery of Silence' and the Chief Priest said, "Brother, this is a silent monastery, you are welcome here as long as you like, but you may not speak until I direct you to do so."
Brother John lived in the monastery for a full year before the Chief Priest said to him:
"Brother John, you have been here a year now, you may speak two words."
Brother John said, "Hard Bed."
"I'm sorry to hear that" the Chief Priest said. "We will get you a better bed."
The next year, Brother John was called by the Chief Priest. "You may say another two words Brother John."
"Cold Food." said Brother John, and the Chief Priest assured him that the food would be better in the future.
On his third anniversary at the monastery, the Chief Priest again called Brother John into his office. "Two words you may say today."
"I Quit." said Brother John.
"It is probably best." said the Chief Priest. "All you have done since you got here is complain."
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/2026/08/08/mastermind-1786147501.png','/Which-is-a-winning-combination-of-digits/8799'))
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 2291
. Each of the numbers can be used only once.','/archive/2026/08/07/numbermania-1786061101.png','/calculate-the-number-2291/8798'))
NUMBERMANIA: Calculate the number 2291 using numbers [5, 7, 6, 5, 90, 345] 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/2026/08/06/magic-square-1785974726.png','/MAGIC-SQUARE-Calculate-A-B-C/8797'))
The aim is to place the some numbers from the list (20, 21, 23, 25, 30, 31, 35, 65, 66, 70) 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 880c7 - bb71a = 5cbb5 find number abc. Multiple solutions may exist. Calculate the number 2753
. Each of the numbers can be used only once.','/archive/2026/08/03/numbermania-1785715501.png','/calculate-the-number-2753/8794'))
NUMBERMANIA: Calculate the number 2753 using numbers [4, 2, 2, 4, 62, 905] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
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If 972cb - 17aca = 79c94 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/2026/08/01/mastermind-1785542701.png','/What-a-winning-combination/8792'))
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. 
