BRAIN TEASERS
Monthly Archive - April 2021

Monthly Archive - April 2021

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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Calculate the number 567

NUMBERMANIA: Calculate the number 567 using numbers [2, 7, 9, 9, 40, 115] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nílton Corrêa de Sousa.
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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 (15, 16, 17, 18, 19, 25, 27, 45, 46, 55) 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: 9
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #magicsquare
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Find number abc

If cb6c6 + bac99 = 458c5 find number abc. Multiple solutions may exist.
Correct answers: 20
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math

Lightbulb Joke Collection 12

Q: How many journalists does it take to screw in a lightbulb?
A: Three. One to report it as an inspired government program to bring light to the people, one to report it as a diabolical government plot to deprive the poor of darkness, and one to win a pulitzer prize for reporting that Electric Company hired a lightbulb assassin to break the bulb in the first place.
Q: How many computer journalists does it take to screw in a light bulb?
A: Five-one to write a review of all the existing light bulbs so you can decide which one to buy, another one to write a remarkably similar one in another magazine the next month, a third to have a big one come out on glossy paper two months later that is by then completely out of date, a fourth to hint in his/her column that a completely new and updated bulb is coming out, and the fifth to report a rumor that that new bulb is shipping with a virus.
Q: How many GLC workers does it take to change a lightbulb ?
A: Four. One to do it and three to go round putting up posters announcing that the GLC, working for London, is going to change the lightbulb.
Q: How many city planners does it take to screw in a light bulb?
A: Six - four to write an extensive study recommending a three-way 100/200/250 watt light bulb, one to write an article in the newspaper praising the study, and one to put in a 10 watt blub instead.
Jokes of the day - Daily updated jokes. New jokes every day.
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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: 19
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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Calculate the number 338

NUMBERMANIA: Calculate the number 338 using numbers [9, 4, 9, 6, 29, 100] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If 8a64a - 7cac0 = b5ca find number abc. Multiple solutions may exist.
Correct answers: 18
The first user who solved this task is Nasrin 24 T.
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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: 22
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 6709

NUMBERMANIA: Calculate the number 6709 using numbers [2, 4, 5, 7, 61, 898] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nasrin 24 T.
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 (8, 11, 12, 19, 22, 23, 42, 45, 46, 54, 57) 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: 14
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If b94c4 + c66a4 = 46068 find number abc. Multiple solutions may exist.
Correct answers: 23
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math
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Jakob Steiner

Died 1 Apr 1863 at age 67 (born 18 Mar 1796).Swiss mathematician who was one of the greatest, contributors to projective geometry. He discovered the Steiner surface which has a double infinity of conic sections on it. The Steiner theorem states that the two pencils by which a conic is projected from two of its points are projectively related. He is also known for the Poncelet-Steiner theorem which shows that only one given circle and a straight edge are required for Euclidean constructions. His work included conic sections and surfaces, the theory of second-degree surfaces and centre-of-gravity problems. He developed the principle of symmetrization (1840-41). In 1848 he ws the first to define various polar curves with respect to a given curve, and introduced the “Steiner Curves.”«
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