BRAIN TEASERS
Brain Teasers (page 182)

Brain Teasers (page 182)

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 1811 to 1820.
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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: 26
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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Calculate the number 824

NUMBERMANIA: Calculate the number 824 using numbers [2, 6, 3, 5, 61, 942] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Fazil Hashim.
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#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (4, 7, 10, 14, 15, 17, 18, 20, 21, 85, 87) 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: 10
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare

The Post Turtle

While suturing up a cut on the hand of a 75 year old farmer, whose hand had been caught in the gate while working his cattle, the doctor struck up a conversation with the old man. Eventually the topic got around to Hone Hawariwa and how he got to be an MP.
The old farmer said, "Well, ya know, Hone is just a Post Tortoise."
Now not being familiar with the term, the doctor asked,
What's a "Post Tortoise?"
The old farmer said, "When you're driving down a country road and you come across a fence post with a Tortoise balanced on top, that's a post Tortoise."
The old farmer saw the puzzled look on the doctor's face so he continued to explain. "You know he didn't get up there by himself, he doesn't belong up there, he doesn't know what to do while he's up there, he sure as hell isn't goin' anywhere, and you just wonder what prick put him there in the first place."

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Find number abc

If a63cb + 45aac = 13ccbc find number abc. Multiple solutions may exist.
Correct answers: 16
The first user who solved this task is Nasrin 24 T.
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#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: 20
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 3656

NUMBERMANIA: Calculate the number 3656 using numbers [1, 3, 9, 2, 66, 384] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If b260c - 6a0a1 = 351b find number abc. Multiple solutions may exist.
Correct answers: 16
The first user who solved this task is Nasrin 24 T.
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: 19
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1866

NUMBERMANIA: Calculate the number 1866 using numbers [5, 6, 1, 8, 89, 237] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nasrin 24 T.
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 (21, 22, 24, 25, 26, 28, 31, 32, 34, 50, 77) 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: 9
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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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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Arago announces electromagnetism

In 1820, Francois Arago announced that a copper wire between the poles of a voltaic cell, could laterally attract iron filings to itself (Ann. de Chim. et de Physique., xv. p.93). His discovery came in the same year that Oersted discovered that an electric current flowing in a wire would deflect a neighbouring compass needle. Arago in the same publication described how he had successfully succeeded in causing permanent magnetism in steel needles laid at right angles to the copper wire. Arago and André-Marie Ampère, discussed and experimented with forming the copper wire into a helix to intensify the magnetizing action. However, it was not until 1825 that the electromagnet in its familiar form was invented by William Sturgeon.«
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