BRAIN TEASERS
Brain Teasers (page 299)

Brain Teasers (page 299)

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 2981 to 2990.
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MAGIC SQUARE: Calculate A*B*C

The aim is to place the some numbers from the list (1, 2, 4, 15, 16, 18, 28, 29, 31, 67, 72, 91) 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: 16
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #magicsquare
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Find number abc

If 87c19 - 40ba0 = 4bbb9 find number abc. Multiple solutions may exist.
Correct answers: 27
The first user who solved this task is Fazil Hashim.
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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: 36
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #mastermind

If you ever fall in love

If you ever fall in love… with who wants to know your favorite color and just how you like your coffee. Fall with someone who loves the way you laugh and would do absolutely anything to hear it. Fall in love with someone who puts their head on your chest just to hear your heart beat.  Fall in love with someone who kisses you in public and is proud to show you off to anyone they know. Fall in love with someone who makes you question why you were afraid to fall in love in the first place. Fall in love with someone who would never ever want to hurt you. Fall in love with someone who falls in love with your flaws and thinks you are perfect just the way you are. Fall in love with someone who thinks that you are the ONE they would love to wake up to each day.
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Calculate the number 3172

NUMBERMANIA: Calculate the number 3172 using numbers [4, 6, 9, 4, 60, 226] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 13
The first user who solved this task is Thinh Ddh.
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#brainteasers #math #numbermania
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Find number abc

If c3c48 - 7b785 = aab63 find number abc. Multiple solutions may exist.
Correct answers: 26
The first user who solved this task is Nílton Corrêa De Sousa.
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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: 47
The first user who solved this task is Nílton Corrêa De Sousa.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 812

NUMBERMANIA: Calculate the number 812 using numbers [1, 8, 1, 5, 35, 646] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 17
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, 4, 6, 17, 19, 21, 47, 70, 72, 74, 88, 90) 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: 12
The first user who solved this task is Nílton Corrêa De Sousa.
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If 8a06a - c584b = 13bbc find number abc. Multiple solutions may exist.
Correct answers: 33
The first user who solved this task is Djordje Timotijevic.
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#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: 46
The first user who solved this task is Djordje Timotijevic.
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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Hydroelectricity

In 1889, a hydroelectric power plant generated alternating current electricity which was for the first time made available to consumers at a significant distance from its origin. A 13 mile power line linked the Willamette Falls Electric Co. power plant to Portland, Ore. Two 300 h.p. Stilwell & Bierce waterwheels together drove a single phase, 720 kilowatt generator. It was not the first hydroelectric power plant, for one had been demonstrated in Appleton, Wisc., 30 Sep 1882 with a small dynamo. Rather, it is the use of alternating current that is significant, for this makes possible long-distance transmission that overcomes the problems of direct current. AC generators driven by steam power had been in use elsewhere since 1886.
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