BRAIN TEASERS
Monthly Archive - June 2025

Monthly Archive - June 2025

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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Calculate the number 4740

NUMBERMANIA: Calculate the number 4740 using numbers [5, 5, 2, 5, 70, 944] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania
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Find number abc

If 6c4a6 + 9cb53 = b546c9 find number abc. Multiple solutions may exist.
Correct answers: 0
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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: 0
CHECK ANSWER
#brainteasers #mastermind

The Pastor's Mother and the Usher

An elderly woman walked into the local country church. The friendly usher greeted her at the door and helped her up the flight of steps. "Where would you like to sit?" he asked politely. "The front row please." she answered. "You really don't want to do that", the usher said. "The pastor is really boring." "Do you happen to know who I am?" the woman inquired."No." he said. "I'm the pastor's mother," she replied indignantly. "Do you know who I am?" he asked. "No." she said. "Good," he answered.
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Calculate the number 7043

NUMBERMANIA: Calculate the number 7043 using numbers [8, 5, 6, 8, 55, 472] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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 (12, 13, 16, 17, 18, 20, 21, 26, 56, 57, 60, 83) 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 8b20a - c6bb1 = a04a2 find number abc. Multiple solutions may exist.
Correct answers: 0
CHECK ANSWER
#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: 0
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1372

NUMBERMANIA: Calculate the number 1372 using numbers [2, 1, 6, 3, 56, 630] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If 4c698 - a00b3 = ac64b find number abc. Multiple solutions may exist.
Correct answers: 0
CHECK ANSWER
#brainteasers #math
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Calculate the number 4721

NUMBERMANIA: Calculate the number 4721 using numbers [9, 7, 6, 5, 96, 697] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
CHECK ANSWER
#brainteasers #math #numbermania
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Cocaine anaesthetic

In 1884, cocaine was first used as a local anaesthetic to immobilize a patient's eye for eye surgery by Carl Koller. His success initiated the modern era of local anesthesia, with cocaine also quickly adopted for nose and throat surgery and for dentistry. For Koller, a Czech-born American ophthalmologist, the clue for this use was when he noticed that cocaine had a numbing effect on the tongue. He made many experiments on animals before introducing its use on humans. Cocaine was isolated in 1859 and was synthesized in 1885. It was later found with high doses or repeated use, it caused erosion of the corneal epithelium in high doses and it was replaced by less toxic, synthetic local anesthetics such as tetracaine and proparacaine.«
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