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The Most Difficult Tasks (page 4)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 31 to 40. |
Find number abc
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If 72abc + 8aa6b = abcca8 find number abc. Multiple solutions may exist. 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/2026/08/15/mastermind-1786752301.png','/Find-the-right-combination/8806'))
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 903
. Each of the numbers can be used only once.','/archive/2026/08/14/numbermania-1786665901.png','/calculate-the-number-903/8805'))
NUMBERMANIA: Calculate the number 903 using numbers [1, 4, 4, 7, 25, 871] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. 
Get Me My Drink
On reaching his plane seat a man is surprised to see a parrot strapped in next to him. He asks the stewardess for a coffee where upon the parrot squawks, "And get me a whisky you cow!" The stewardess, flustered, brings back a whisky for the parrot and forgets the coffee.
When this omission is pointed out to her the parrot drains its glass and bawls, "And get me another whisky you bitch". Quite upset, the girl comes back shaking with another whisky but still no coffee.
Unaccustomed to such slackness the man tries the parrot's approach, "I've asked you twice for a coffee, go and get it now or I'll kick your ass".
Next moment both he and the parrot have been wrenched up and thrown out of the emergency exit by two burly stewards. Plunging downwards the parrot turns to him and says, "For someone who can't fly you're a lippy bastard!"
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/2026/08/13/magic-square-1786579546.png','/MAGIC-SQUARE-Calculate-A-B-C/8804'))
The aim is to place the some numbers from the list (21, 22, 26, 29, 30, 34, 36, 37, 41, 48, 61) 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 5a1c1 - 41bac = 15c1b find number abc. Multiple solutions may exist. 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. 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. 
