BRAIN TEASERS
The Most Difficult Tasks (page 108)

The Most Difficult Tasks (page 108)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1071 to 1080.
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Calculate the number 8340

NUMBERMANIA: Calculate the number 8340 using numbers [6, 9, 6, 7, 96, 782] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania
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Find the right 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: 2
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1254

NUMBERMANIA: Calculate the number 1254 using numbers [9, 3, 2, 7, 91, 136] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania

Fearsome

“Fearsome is a phobia about addition.”

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Calculate the number 2487

NUMBERMANIA: Calculate the number 2487 using numbers [7, 9, 1, 2, 82, 341] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If a4c2c + 64a96 = b3932b find number abc. Multiple solutions may exist.
Correct answers: 2
CHECK ANSWER
#brainteasers #math
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Find the right 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: 2
CHECK ANSWER
#brainteasers #mastermind
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Find number abc

If 92717 - 2baba = c8a7b find number abc. Multiple solutions may exist.
Correct answers: 2
CHECK ANSWER
#brainteasers #math
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Find the right 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: 2
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 2539

NUMBERMANIA: Calculate the number 2539 using numbers [6, 8, 3, 9, 32, 251] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If 579c7 + 975aa = 155b60 find number abc. Multiple solutions may exist.
Correct answers: 2
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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Ebenezer Kinnersley

Died 4 Jul 1778 at age 66 (born 30 Nov 1711).English-born American experimenter and inventor who investigated electricity. In 1748 Kinnersley demonstrated that the electric fluid actually passed through water, using a 10-ft long trough of water. In 1751, as one of the earliest popularizers of science, he began delivering lectures on "The Newly Discovered Electrical Fire." His experiments discovered the difference between the electricity that was produced by the glass and sulphur globes, which he communicated to Benjamin Franklin at Philadelphia, since they showed beyond a doubt that the positive and negative theory was correct. He also sought ways to protect buildings from lightning, invented an electric thermometer (c. 1755), and demonstrated that electricity can produce heat.«[Image: simplified version of Kinnersley's electrical air thermometer in which colored water in the airtight cylinder pushed water up the capillary tube when sparking between electrodes heated and expanded the air.]
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