BRAIN TEASERS
Math (page 102)

Math (page 102)

These are fun math riddles. All of these tricky riddles are based on real math concepts and can be solved with purely math and logic. These are the tasks listed 1011 to 1020.
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Calculate the number 7724

NUMBERMANIA: Calculate the number 7724 using numbers [5, 7, 6, 4, 72, 992] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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MAGIC SQUARE: Calculate A*B*C

The aim is to place the some numbers from the list (14, 15, 19, 27, 28, 32, 40, 41, 45, 95) 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: 3
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#brainteasers #math #magicsquare
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Find number abc

If b4c09 - cb9a2 = 2cc3a find number abc. Multiple solutions may exist.
Correct answers: 5
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Cowboy in Church

One Sunday a cowboy went to church. When he entered, he saw that he and the preacher were the only ones present. The preacher asked the cowboy if he wanted him to go ahead and preach.
The cowboy said, "I'm not too smart, but if I went to feed my cattle and only one showed up, I'd still feed him."So the minister began his sermon.
One hour passed, then two hours, then two-and-a-half hours. The preacher finally finished and came down to ask the cowboy how he liked the sermon.
The cowboy answered slowly, "Well, I'm not very smart, but if I went to feed my cattle and only one showed up, I sure wouldn't feed him all the hay."
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Calculate the number 595

NUMBERMANIA: Calculate the number 595 using numbers [5, 2, 8, 2, 52, 571] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 5
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#brainteasers #math #numbermania
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Find number abc

If b51ca - ba6b7 = 444c find number abc. Multiple solutions may exist.
Correct answers: 4
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#brainteasers #math
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Calculate the number 3628

NUMBERMANIA: Calculate the number 3628 using numbers [3, 4, 4, 8, 88, 980] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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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 (1, 2, 3, 4, 8, 10, 12, 13, 14, 20, 32, 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: 2
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#brainteasers #math #magicsquare
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Find number abc

If 8b2a8 - cba60 = 29c18 find number abc. Multiple solutions may exist.
Correct answers: 9
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#brainteasers #math
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Calculate the number 7792

NUMBERMANIA: Calculate the number 7792 using numbers [7, 4, 5, 8, 40, 623] 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 b0aaa - 5a27c = 2bbcb find number abc. Multiple solutions may exist.
Correct answers: 4
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#brainteasers #math
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Ultrasound article

In 1958, a seminal article that launched the widespread use of ultrasound in medical diagnosis was published in The Lancet by Ian Donald, an English physician. After a few years developing the experimental use of ultrasound, Donald had applied it to treat patients in his hospital. In the Lancet article, Investigation of Abdominal Masses by Pulsed Ultrasound, he described how he was able to make the life-saving diagnosis of a huge, easily removable, ovarian cyst in a woman who had been diagnosed by others as having inoperable stomach cancer. Donald knew about sonar from his service in WW II, and industrial use of reflected ultrasound waves for flaw detection in materials, and with help from others, he launched its use in medicine.«[Image: a page from the Lancet article.]
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