BRAIN TEASERS
The Most Difficult Tasks (page 33)

The Most Difficult Tasks (page 33)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 321 to 330.
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Calculate the number 7523

NUMBERMANIA: Calculate the number 7523 using numbers [1, 4, 1, 7, 90, 851] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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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 (21, 22, 23, 26, 27, 28, 32, 42, 43, 44) 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: 0
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If ca0ba + 22655 = b3c46 find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math

Sudden Wind Storm

A policeman noticed an old lady standing on a street corner during a sudden windstorm.

She was bracing herself by holding a lightpost with one hand, and she was holding her hat snuggly against her head with her other hand.

Unfortunately, a strong gust blew her dress upward, and it continued to flap in the wind, exposing her privates for everyone to see.

The policeman asked, "Hey Lady, eveybody is taking a look at what you`ve got. Don`t you think that pulling your dress down is more important than worrying about your hat?"

"Look, sonny,.... what these people are looking at is 60 years old. ...But the hat is BRAND NEW!"

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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: 0
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 776

NUMBERMANIA: Calculate the number 776 using numbers [6, 1, 9, 2, 93, 131] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If cba33 - bc3ac = c0ba find number abc. Multiple solutions may exist.
Correct answers: 0
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: 0
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 345

NUMBERMANIA: Calculate the number 345 using numbers [9, 4, 3, 4, 18, 406] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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 (1, 3, 6, 8, 10, 15, 19, 21, 25, 28, 54) 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: 0
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If b5075 + 224ca = a0753c find number abc. Multiple solutions may exist.
Correct answers: 0
CHECK ANSWER
#brainteasers #math
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Tunguska meteorite

In 1908, at around 7:15 am, northwest of Lake Baikal, Russia, a huge fireball nearly as bright as the Sun was seen crossing the sky. Minutes later, there was a huge flash and a shock wave felt up to 650 km (400 mi) away. Over Tunguska, a meteorite over 50-m diameter, travelling at over 25 km per second (60,000 mph) penetrated Earth's atmosphere, heated to about 10,000 ºC and detonated 6 to10 km above the ground. The blast released the energy of 10-50 Megatons of TNT, destroying 2,200 sq km of forest leaving no trace of life. The Tunguska rock came out of the Taurid Meteor storm that crosses Earth's orbit twice a year. The first scientific expedition for which records survive was made by Russian mineralogist Leonid Kulik in 1927.[Image: a view of charred forest trees blown to the ground show the direction of the blast.]
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