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The Most Difficult Tasks (page 11)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 101 to 110. |
Calculate the number 1421
. Each of the numbers can be used only once.','/archive/2026/06/01/numbermania-1780272301.png','/calculate-the-number-1421/8733'))
NUMBERMANIA: Calculate the number 1421 using numbers [9, 4, 1, 2, 74, 383] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
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If baacc + 2a311 = 122baa 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/2026/05/30/mastermind-1780099502.png','/Which-is-a-winning-combination-of-digits/8731'))
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. 
The New Flight Atten
A pilot got on the loudspeaker shortly after takeoff and said to the passengers, "Folks, welcome aboard flight seven eighty-nine to Cleveland. We'll be flying at thirty-five-thousand feet, and expect to land in an hour and a half. Just sit back, relax, and enjoy the flight."
Forgetting to turn off the microphone, he turned to his co-pilot, yawned, and said, "Why don't you take over for a while? I'm going to take me a big healthy shit, and then I'm gonna shag the brains outta that new blonde flight attendant."
His announcement went over the whole plane. The pretty blonde flight attendant heard this and exclaimed, "Oh my God!" and started running towards the cockpit.
An old lady sitting in an aisle seat stopped her and said, "Relax honey, he's gotta take a shit first."
Calculate the number 7592
. Each of the numbers can be used only once.','/archive/2026/05/29/numbermania-1780013101.png','/calculate-the-number-7592/8730'))
NUMBERMANIA: Calculate the number 7592 using numbers [5, 8, 9, 3, 42, 881] 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/2026/05/28/magic-square-1779926727.png','/MAGIC-SQUARE-Calculate-A-B-C/8729'))
The aim is to place the some numbers from the list (16, 17, 22, 28, 29, 34, 45, 60, 61, 66) 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 c89a9 - 1b92c = 2104a find number abc. Multiple solutions may exist. Find number abc
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If 12bbc + 225c6 = bcaa0 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/2026/05/23/mastermind-1779494701.png','/Which-is-a-winning-combination-of-digits/8726'))
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 1314
. Each of the numbers can be used only once.','/archive/2026/05/22/numbermania-1779408302.png','/calculate-the-number-1314/8725'))
NUMBERMANIA: Calculate the number 1314 using numbers [9, 8, 4, 9, 68, 829] 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/2026/05/21/magic-square-1779321971.png','/MAGIC-SQUARE-Calculate-A-B-C/8724'))
The aim is to place the some numbers from the list (14, 15, 16, 23, 24, 25, 30, 57, 58, 69, 70, 71) 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. 
