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The Most Difficult Tasks (page 19)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 181 to 190. |
Find number abc
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If 34acc + ba42a = 52b2a 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/2026/02/21/mastermind-1771632301.png','/What-a-winning-combination/8636'))
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 1762
. Each of the numbers can be used only once.','/archive/2026/02/20/numbermania-1771545901.png','/calculate-the-number-1762/8635'))
NUMBERMANIA: Calculate the number 1762 using numbers [7, 1, 9, 3, 46, 223] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. 
Normal sex life
When the good Lord was making the world, he called Man aside and bestowed upon him 20 years of normal sex life. Man was horrified, but the Creator refused to budge. Then the Lord called the Monkey and gave him 20 years.
"But I don't need 20 years," said the Monkey. "Ten years is plenty."
"May I have the other 10 years?" asked Man. The Monkey agreed.
The Lord called the Lion next and also gave him 20 good years. The Lion also only wanted 10, so again Man asked for the remaining ten. Then came the Donkey, who was also granted 20 years. Like the others, 10 was more than enough. Man again asked for the spare ten years and got them.
This explains why Man has 20 years of normal sex life, 10 years of monkeying around, 10 years of lion 'bout it, and 10 years of making an ass out of himself.
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/2026/02/19/magic-square-1771459547.png','/MAGIC-SQUARE-Calculate-A-B-C/8634'))
The aim is to place the some numbers from the list (1, 5, 10, 11, 15, 18, 19, 23, 49, 50, 54) 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 a582c - 59bcc = a72c 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/2026/02/17/mastermind-1771286701.png','/Find-the-right-combination/8632'))
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 516
. Each of the numbers can be used only once.','/archive/2026/02/16/numbermania-1771200301.png','/calculate-the-number-516/8631'))
NUMBERMANIA: Calculate the number 516 using numbers [1, 9, 2, 4, 18, 254] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
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If aa8c9 + 60a0b = bb63a0 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/2026/02/14/mastermind-1771027501.png','/Find-the-right-combination/8629'))
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 2159
. Each of the numbers can be used only once.','/archive/2026/02/13/numbermania-1770941101.png','/calculate-the-number-2159/8628'))
NUMBERMANIA: Calculate the number 2159 using numbers [5, 8, 4, 2, 27, 278] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. 
