BRAIN TEASERS
Brain Teasers

Brain Teasers

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 1 to 10.
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (5, 13, 14, 20, 26, 27, 33, 42, 62, 63, 69) 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: 4
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #magicsquare
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Find number abc

If 5b3ab - ca7ca = 376b8 find number abc. Multiple solutions may exist.
Correct answers: 7
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: 8
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind

Harmonica

"Thanks for the harmonica you gave me for Christmas," little Joshua said to his uncle the first time he saw him after the holidays. "It's the best present I ever got."

"That's great," said his uncle. "Do you know how to play it?"

"Oh, I don't play it," the little fellow said. "My mom gives me a dollar a day not to play it during the day and my dad gives me five dollars a week not to play it at night.

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Calculate the number 2593

NUMBERMANIA: Calculate the number 2593 using numbers [2, 2, 8, 3, 85, 960] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 7
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania
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Find number abc

If 7a648 - b6647 = 45cca find number abc. Multiple solutions may exist.
Correct answers: 15
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: 14
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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Calculate the number 205

NUMBERMANIA: Calculate the number 205 using numbers [6, 9, 1, 5, 19, 156] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
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 (10, 12, 14, 18, 20, 22, 30, 32, 34, 79) 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: 8
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #magicsquare
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Find number abc

If 95b11 - 4a9cc = 4ab45 find number abc. Multiple solutions may exist.
Correct answers: 20
The first user who solved this task is Nasrin 24 T.
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#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: 18
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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John Wallis

Born 3 Dec 1616; died 8 Nov 1703 at age 86. British mathematician who introduced the infinity math symbol. Wallis was skilled in cryptography and decoded Royalist messages for the Parliamentarians during the Civil War. Subsequently, he was appointed to the Savilian Chair of geometry at Oxford in 1649, a position he held until his death more than 50 years later. Wallis was part of a group interested in natural and experimental science which became the Royal Society, so Wallis is a founder member of the Royal Society and one of its first Fellows. Wallis contributed substantially to the origins of calculus and was the most influential English mathematician before Newton.[DSB gives dates 3 Dec 1616 - 8 Nov 1703. EB gives 23 Nov 1616 - 28 Oct 1703.]
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