BRAIN TEASERS
The Most Difficult Tasks (page 83)

The Most Difficult Tasks (page 83)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 821 to 830.
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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
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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
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Find number abc

If 93b63 - b6aa8 = b668c find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math

One Sunday, in counting the mo...

One Sunday, in counting the money in the weekly offering, the Pastor of a small church found a pink envelope containing $1,000. It happened again the next week!
The following Sunday, he watched as the offering was collected and saw an elderly woman put the distinct ivepink envelope on the plate. This went on for weeks until the pastor, overcome by curiosity, approached her.
"Ma'am, I couldn't help but notice that you put $1,000 a week in the collection plate," he stated.
"Why yes," she replied, "every week my son sends me money and I give some of it to the church."
The pastor replied, "That's wonderful. But $1000 is a lot,are you sure you can afford this? How much does he send you?"
The elderly woman answered, "$10,000 a week."
The pastor was amazed. "Your son is very successful;what does he do for a living?"
"He is a veterinarian," she answered.
"That's an honorable profession, but I had no idea they made that much money," the pastor said. "Where does he practice?"
The woman answered proudly, "In Nevada .. He has two cat houses, one in Las Vegas, and one in Reno"
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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 2292

NUMBERMANIA: Calculate the number 2292 using numbers [8, 4, 6, 2, 44, 477] 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 (6, 9, 11, 18, 21, 23, 64, 67, 69, 72, 97) 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: 1
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If ac313 - ba08c = b9bb9 find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
[link]

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
[link]

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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Find number abc

If bbb55 + 795a6 = 101ac1 find number abc. Multiple solutions may exist.
Correct answers: 1
CHECK ANSWER
#brainteasers #math
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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.
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Revolving turret patent

In 1862, U.S. patent No. 36,593 was issued for a revolving turret for battleships to the inventor, Theodore Ruggles Timby (born Dover, NY, 5 Apr 1822). When Ericsson built the first turret battleship in the world, the Monitor, he added a turret based on Timby's design to the ship.«[Image: detail from Patent No. 36,593]
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