BRAIN TEASERS
The Most Difficult Tasks (page 93)

The Most Difficult Tasks (page 93)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 921 to 930.
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Calculate the number 700

NUMBERMANIA: Calculate the number 700 using numbers [4, 6, 2, 9, 16, 822] 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 cb293 - c0c77 = 5a1b find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 739

NUMBERMANIA: Calculate the number 739 using numbers [2, 4, 6, 5, 69, 169] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania

How To Tell If Your Dog Is Involved In A Sex Scandal

How To Tell If Your Dog Is Involved In A Sex Scandal
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Find number abc

If b2cc4 - 28b2b = 33a28 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 778

NUMBERMANIA: Calculate the number 778 using numbers [3, 4, 2, 4, 13, 146] 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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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (4, 6, 10, 15, 31, 32, 33, 34, 36, 37, 38, 65) 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
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#brainteasers #math #magicsquare
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Find number abc

If 4c649 - a09b2 = b77a7 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 472

NUMBERMANIA: Calculate the number 472 using numbers [9, 2, 1, 8, 12, 526] 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 77b8c + 44bba = cbc5ac find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 5925

NUMBERMANIA: Calculate the number 5925 using numbers [9, 7, 8, 6, 65, 782] 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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Fred Allison

Born 4 Jul 1882; died 2 Aug 1974 at age 92.American physicist who promoted a magneto-optical technique to detect isotopes (ultimately shown to be non-existent by D. Morey under Merritt at Cornell). This method, he said, was able to distinguish 16 isotopes of lead. In 1931, he thought he had detected the new element 87 in lepidolite, a lithium ore, which he called virginium, now called francium. (This is regarded as erroneous because the element has no long-lived isotopes. The confirmed discovery came in Jan 1939 by Marguerite Perey who discovered it in decay products of actinium). He also thought he had found 2 micrograms of element 85 in monazite, which he named alabamine. (Also now believed erroneous. It was discovered later, and named astatine.)«
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