BRAIN TEASERS
The Most Difficult Tasks (page 77)

The Most Difficult Tasks (page 77)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 761 to 770.
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Calculate the number 8207

NUMBERMANIA: Calculate the number 8207 using numbers [5, 9, 7, 3, 23, 919] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania
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Find number abc

If 3c5ab + b292b = c7c22 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 773

NUMBERMANIA: Calculate the number 773 using numbers [7, 2, 2, 6, 77, 937] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania

The Wisdom of Yoda – a little late

The Wisdom of Yoda – a little late
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Calculate the number 246

NUMBERMANIA: Calculate the number 246 using numbers [1, 6, 7, 9, 66, 170] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania
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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: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 2496

NUMBERMANIA: Calculate the number 2496 using numbers [1, 5, 5, 1, 54, 363] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania
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Find number abc

If aaccb - 1ba77 = 1c072 find number abc. Multiple solutions may exist.
Correct answers: 1
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: 1
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 2421

NUMBERMANIA: Calculate the number 2421 using numbers [2, 7, 9, 8, 97, 785] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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, 5, 7, 11, 14, 16, 46, 49, 51, 65, 80) 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: 1
CHECK ANSWER
#brainteasers #math #magicsquare
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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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Transpacific cable

In 1903, the first cable across the Pacific Ocean between Hawaii, Midway, Guam and Manila was completed and spliced at Manila, Philippine Islands. After testing, the first official message was sent the next day. The first section of the cable across the Pacific Ocean between San Francisco and Hawaii had already been established at the beginning of the same year, with its first official message sent on 1 Jan 1903. That technological event ended Hawaii's isolation by connecting it to the mainland U.S. and the rest of the world. The cable was a mainstay of communications into the early 1950s when newer technology rendered it obsolete. (The 1902 all-British telegraph line from Canada to Australia and New Zealand was the first line to cross the Pacific Ocean.)
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