BRAIN TEASERS
The Most Difficult Tasks (page 122)

The Most Difficult Tasks (page 122)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1211 to 1220.
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Calculate the number 1996

NUMBERMANIA: Calculate the number 1996 using numbers [9, 4, 1, 4, 80, 168] 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 number abc

If 188a6 + cb3c4 = 8a2cb find number abc. Multiple solutions may exist.
Correct answers: 2
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#brainteasers #math
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (11, 13, 19, 21, 23, 27, 29, 32, 43, 45, 51, 74) 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: 2
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#brainteasers #math #magicsquare

Sweeney Todd

Barber Sweeney Todd never killed anyone.
Those are just vicious groomers.
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Find number abc

If ab1b4 - c6b63 = cba1 find number abc. Multiple solutions may exist.
Correct answers: 2
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#brainteasers #math
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Find number abc

If 6bbc6 - ca964 = 3cb6c find number abc. Multiple solutions may exist.
Correct answers: 2
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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: 2
CHECK ANSWER
#brainteasers #mastermind
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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 3915c + 1abaa = 511cb find number abc. Multiple solutions may exist.
Correct answers: 2
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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: 2
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: 2
CHECK ANSWER
#brainteasers #mastermind
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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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Taconite production

In 1933, the first cargo of taconite, a hard rock containing 25% - 30% iron, was shipped to the Ford Motor Company of River Rouge, Mich. The cargo had been produced 21 Jun 1922 by the Mesabi Iron Co. of Babbitt, Minn. The firm had begun operation in Nov 1919. Taconite is a low-grade ore containing only up to 30% magnetite and hematite as tiny particles scattered throughout a very tough variety of quartz called chert. The Mesabi Range, a giant area of low rolling hills in northeastern Minnesota is among the world's best known deposits of iron (discovered 1887). Mesabi is an Ojibwa name meaning "giant." After WW II, when other, higher grade iron ore had been depleted, an industrial method to exploit taconite ore was developed.
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