BRAIN TEASERS
Monthly Archive - July 2025 (page 2)

Monthly Archive - July 2025 (page 2)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 11 to 20.
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Calculate the number 1177

NUMBERMANIA: Calculate the number 1177 using numbers [5, 4, 4, 3, 11, 289] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania
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Find number abc

If cb5ac + 733ab = 85a83 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Which is a winning combination of digits?

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.
Correct answers: 1
CHECK ANSWER
#brainteasers #mastermind

Three Policemen at the Pearly Gates

Three police officers were standing in line at the Pearly Gates.Saint Peter asked the first officer, “What did you do with your life?”“I was a police officer,” he responded.“What kind of police officer?” Saint Peter asked.“I was a vice officer. I kept drugs off the streets and out of the hands of kids.”“Welcome to heaven. You may end the gates.”He asked the second man what he did as a police officer.“I was a traffic officer,” said the man. “I kept the roads and highways safe.”“Welcome to heaven. You may enter the gates.”He asked the third man what he did as a police officer.“I was a military policeman, sir,” replied the man.“Wonderful! I’ve been waiting for you all day!” replied Saint Peter. “I need to take a break! Watch the gate, will you?”
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Calculate the number 4278

NUMBERMANIA: Calculate the number 4278 using numbers [1, 2, 4, 9, 70, 730] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (7, 8, 17, 19, 26, 27, 36, 50, 65, 66, 75, 91) 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.
Correct answers: 0
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#brainteasers #math #magicsquare
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Find number abc

If c6c8c + 9063a = a37aab find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
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What a winning combination?

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.
Correct answers: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 473

NUMBERMANIA: Calculate the number 473 using numbers [2, 3, 1, 1, 10, 326] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If 98242 - 9bacc = 18b5 find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
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What a winning combination?

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.
Correct answers: 0
CHECK ANSWER
#brainteasers #mastermind
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Tzar DNA identified

In 1993, British and Russian scientists using DNA genetic fingerprinting tests, identified the bone fragments discovered in Ekaterinburg in 1979 to be those of the Russian Tzar Nicholas II and members of his family executed on 17 July 1918. This was work done by Drs. Peter Gill and Kevin Sullivan of the British Forensic Science Service in Birmingham. However, a slight ambiguity remained for the identification of the Tzar until a heteroplasmy was confirmed. Additional mitochondrial DNA (MtDNA) testing was carried in 1995 out by the US Armed Forces DNA Identification Laboratory (AFDIL) who identified the Tzar using sequence analysis and comparison of the profiles with remains of Georgij Romanov, the Tzar's younger brother, exhumed in 1994. They shared the same rare genetic partial mutation called heteroplasmy. Together with with other physical and circumstantial data, this provided indisputable evidence for identification of the Tzar.
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