BRAIN TEASERS
Math (page 91)

Math (page 91)

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 901 to 910.
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MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (17, 19, 20, 23, 25, 26, 47, 61, 63, 64, 89) 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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Find number abc

If 54ca7 + 997c1 = 1546bc find number abc. Multiple solutions may exist.
Correct answers: 12
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Calculate the number 691

NUMBERMANIA: Calculate the number 691 using numbers [6, 2, 6, 4, 42, 561] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania

Job Interview

Reaching the end of a job interview, the Human Resources Person asked a young Engineer fresh out of MIT, "And what starting salary were you looking for?"
The Engineer said, "In the neighbourhood of $125,000 a year, depending on the benefits package."
The interviewer said, "Well, what would you say to a package of 5-weeks vacation, 14 paid holidays, full medical and dental, company matching retirement fund to 50% of salary, and a company car leased every 2 years say, a red Corvette?"
The Engineer sat up straight and said, "Wow! Are you kidding?"
And the interviewer replied, "Yeah, but you started it."

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Find number abc

If 744cb - abbca = 17c01 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 330

NUMBERMANIA: Calculate the number 330 using numbers [6, 7, 7, 8, 24, 213] 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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MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (8, 12, 13, 16, 23, 27, 28, 29, 33, 34, 58) 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 c5a0c + aaaab = bbc4a4 find number abc. Multiple solutions may exist.
Correct answers: 2
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#brainteasers #math
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Calculate the number 1143

NUMBERMANIA: Calculate the number 1143 using numbers [4, 9, 8, 8, 51, 959] 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 6caac - ccb42 = 29261 find number abc. Multiple solutions may exist.
Correct answers: 1
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#brainteasers #math
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Calculate the number 2184

NUMBERMANIA: Calculate the number 2184 using numbers [2, 1, 1, 6, 98, 820] 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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Regiomontanus

Born 6 Jun 1436; died 6 Jul 1476 at age 40.German astronomer and mathematician who was chiefly responsible for the revival and advancement of trigonometry in Europe. His book De triangulis omnimodis (1464) is a systematic account of methods for solving triangles. In Jan 1472 he made observations of a comet which were accurate enough to allow it to be identified with Halley's comet 210 years later (being three returns of the 70 year period comet). He also observed several eclipses of the Moon. His interest in the motion of the Moon led him to make the important observation that the method of lunar distances could be used to determine longitude at sea. However, instruments of the time lacked the necessary accuracy to use the method at sea.
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