BRAIN TEASERS
Monthly Archive - November 2019 (page 2)

Monthly Archive - November 2019 (page 2)

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

If 8b73c - 777ca = 3baa find number abc. Multiple solutions may exist.
Correct answers: 22
The first user who solved this task is Nílton Corrêa de Sousa.
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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: 22
The first user who solved this task is Fazil Hashim.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 808

NUMBERMANIA: Calculate the number 808 using numbers [4, 2, 9, 4, 60, 140] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania

There were two buddies, one wi...

There were two buddies, one with a Doberman Pinscher and the other with a Chihuahua. The guy with the Doberman Pinscher says to his friend, "Let's go over to that restaurant and get something to eat."
The guy with the Chihuahua says, "We can't go in there. We've got dogs with us."
The buddy with the Doberman Pinscher says, "Just follow my lead."
They walk over to the restaurant, the guy with the Doberman Pinscher puts on a pair of dark glasses and he starts to walk in. The bouncer at the door says, "Sorry, mac, no pets allowed."
The man with the Doberman Pinscher says, "You don't understand. This is my seeing-eye-dog."
The bouncer says, "A Doberman Pinscher?"
He answers, "Yes, they're using them now; they're very good and protect me from robbers, too."
The man at the door says, "Come on in."
The buddy with the Chihuahua figures, "What the heck," so he puts on a pair of dark glasses and starts to walk in.
Once again the bouncer says, "Sorry, pal, no pets allowed."
The guy with the Chihuahua says, "You don't understand. This is my seeing-eye dog."
The bouncer at the door says, "A Chihuahua?"
The man with the Chihuahua says, "A Chihuahua?????? They gave me a Chihuahua?!"
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Find number abc

If cbb30 - ab476 = b97a4 find number abc. Multiple solutions may exist.
Correct answers: 24
The first user who solved this task is Fazil Hashim.
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: 19
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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Calculate the number 799

NUMBERMANIA: Calculate the number 799 using numbers [4, 3, 1, 3, 84, 110] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 15
The first user who solved this task is Nílton Corrêa de Sousa.
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 (2, 3, 4, 5, 6, 7, 19, 20, 21, 59, 93) 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
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Find number abc

If 66aa4 - 439cb = aaa73 find number abc. Multiple solutions may exist.
Correct answers: 28
The first user who solved this task is Nasrin 24 T.
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: 23
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 9712

NUMBERMANIA: Calculate the number 9712 using numbers [3, 7, 4, 6, 16, 962] 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.
CHECK ANSWER
#brainteasers #math #numbermania
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Electromagnet first exhibited

In 1825, the electromagnet in a practical form was first exhibited by its inventor, William Sturgeon, on the occasion of reading a paper, recorded in the Transactions of the Society of Arts for 1825 (Vol xliii, p.38). The publication showed pictures of his set of improved apparatus for electromagnetic experiments, including two electromagnets, one of horse-shoe shape and one a straight bar. The formed was bent from a rod about 1 foot (30 cm) long and one-half inch (1.3 cm) in diameter, varnished for insulation, then coiled with a single spiral of 18 turns of stout copper wire. In return for the Society's medal and premium, Sturgeon deposited the apparatus in the museum of the Society. Sadly, this was lost after the society's museum was dispersed.«
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