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...here is a simple 'trick' to solve this problem without doing any integrals. Anyone have any idea?
The math-intensive answer is here:...
(I don't know how difficult this puzzle is.)
Let a(m,k) =
1
Sorry, my maths isn't very good, so I'd be grateful if someone could work this out for me! (or, better still, give the formula (in layman's terms) for an n-sided dice, t times)
Me and my friend both
...
In an alternate reality:
Santa caught the elf before he could begin his maniacal plan. Santa did the math.
'You idiot!' he screamed. What do you think I'm doing here, delivering Widgets to half t...
...puzzle that fits in a 4x5 space?
I think I have a good candidate for that. I found it while writing a Math Games column on Sliding Block Puzzles.
http://www.maa.org/editorial/mathgames/mathgames_1...
...: the new problems (High School, Advanced, and Challenge) have been posted. Please visit us at
http://math.smsu.edu/~les/POTW.html...
...ution for n=4 that ends in a 23. (I leave finding a last-integer-is-23 solution for rec.puzzles and sci.math readers as a puzzle.)
Is it possible to end on even a lower integer with n=4?
(We can a...
...form, thusly:
In each round there will be one:
Lateral Thinking puzzle Wordplay puzzle Logic puzzle Maths puzzle Cipher puzzle Sequence puzzle
and one miscellaneous puzzle.
4) Each question wi...
...stion is: What is the probability of me being screwed if I study for 5 questions only? I mean I know no math or anything but it seems a pretty low chance for both of the questions to be among the thre...
...gned seat?
Below, I give a solution to this problem. However, this problem appeared in a popular, non-mathematical forum, and my solution strikes me as a bit too mathematically/probabilistically sop...
...ve solution?
There is really no real world application to this theory. Look at the following 'laws of mathematics'. These laws contradict it.....
Ok.... 2 X 3 = 2 + 2 + 2 = 6...
At http://www.mathpuzzle.com , I give a one line explanation of how to solve the Sicherman dice problem. I've recently started compiling other Sicherman-like sets of dice, using polynomial factorizati
...s. It has been withdrawn and a new, similar (and one hopes, correct) puzzle has been posted at
http://math.smsu.edu/~les/Challenge.html
Sorry about that!...
...have just one '4' and two '7's.' Using these, all three but no other figures, together with any regular mathematical signs, you have to make up expressions for the successive numbers from '1' upwards....
...one round per week) with 5 puzzles per round and 5 points per correct answer. 3) Each puzzle featured 1 maths problem, one logic problem, one lateral thinking problem, one wordplay puzzle and one 'oth...
...
Today he gave the following hint(s): If you figure out the WHY part, the answer will be obvious. The math is a red herring.
Anyone have any ideas?...
Here are a few more matchstick equation problems I designed for my math class. One of them is from my student Isaac. The rules of the game are: 1) You must use all the matchsticks 2) You can't break,
Unless there is a pure-math proof of a solution/non-solution, this is a kind of math-based maze.
For a positive integer n, take an n-by-n grid. Label the rows with the first n primes, and do the sam
This is more a topic for rec.puzzles than sci.math, but there is a touch of genuine math in it, near the end, so I post here as well.
Leroy asks about 'prime trees', that is, full binary trees label
[posted also in sci.math]
Consider the string of digits formed by concatenating the natural numbers in base 10: C = '123456789101112131415...'
Some integers (as consecutive digits) occur 'prematur
This was bugging me recently. I thought the solution would be simple. And after several false solutions, I have finally given up.
What is the number of permutations of the first m positive integers
Pretend you are a surveyor asking people whether they prefer apples or oranges to make the 'new flavor' of a famous snack. We have already established that half the country (of 500-550 people) prefers
Came across this during a Google search for mathematical puzzles. It wasn't immediately apparent that it had been posted in this NG before so here goes...
http://www.syvum.com/cgi/online/serve.cgi/c
what number that has a remainder of 1 and is divisable by 2,3,4,5, and 6 but has no leftover when divided by 7?
Here is a puzzle that I made up today that is kind of fun to solve.
Start with a n-by-n grid. Place a zero in one of the squares. Then place every integer from 1 to n^2 -1 into the grid (one integer
...I am terminating my Google membership, at least temperarily.
I had much more to say on the subject of mathematics, but, who knows if I will return.
Thank you, Leroy Quet
PS: Take any messages fr...
Begin with a finite set of integers (such as all the positive integers
A friend gave me this puzzle a while back and I still cant solve it.. Im sure that it has a solution, but im just not smart enough. The rules are simple and follow below.
Combine the three numbers i
[a sci.math poster requested a mathematical 'function' describing the swastika, an ancient hooked cross common to many cultures and religions]
IANAN, but:
Consider a grid of evenly spaced orthogon
Hi! Occasionally I come across, in various magazines, puzzles like this:
Arrange the digits 1-9 in such a way that their sum is 100.
or
Adding only 2 additions and 2 subtractions to the followin
... published. - 'in each instalment' (american spelling) - 'If you paid attention in English, history and math classes, you have a genuine shot at finding all of them.' False statement. There's a whole ...
...h no other figures at all, make an expression for 24. With the three 'ones,' of course, you may use any mathematical signs you know; but no words, such as 'log.' For example, if you had to express the...
Hopefully this is the right newsgroup to post this. This puzzle is kind of mathematical in nature. It had appeared in a Russian math contest.
On a black board are written ten 1's,twenty 2's and twen
This is a tough one.
A train is travelling on a straight line with speed 60 kmph. At a particular time instance, a bird which is 30 km away from the train, exactly on a line perpendicular to the tra
...riend of mine, who is one of the remaining sceptical people who refuse to accept the right solution and mathematical proof :-) (he does not understand) i wrote a little program which simulates 10000 t...
Imagine a perfect sphere diameter 40 centimeters resting up against a perfectly straight wall on a perfectly straight floor (in other words, at a perfect right angle) thus creating a gap between the b
...mod functions (example: f(n) = n/3 if n = 0 mod 3 f(n) = 2n if n = 1 mod 3 f(n) = n if n = 2 mod 3). 6) Math functions only...
..., 4, 2, 5, 7, 4, 2, 2, 6, 1
Identify the sequence.
The above sequence has 26 terms, hint hint.
No math beyond counting required.
This one should be solved quickly.......
Here are a few samples of matchstick equation problems I designed for my math class. The rules of the game are: 1) You must use all the matchsticks 2) You can't break, bend, etc. any matchstick 3) All
There is a solution for 8 as well...
Group 1: 9-((6*2)/12) = 8 Group 2: (45-9)/3)-4 = 8 Group 3: (9-5)+(3+1) = 8 Group 4: (66+11)/7-3 = 8 Group 5: (6-3)+(9-4) = 8
If anyone can find a solution for
... winning a previously unseen trophy is; since this decreased by .8 every time I won a trophy, I did the math and figured there were probably 125 trophies, was my reasoning correct given my assumptions...
...kind of puzzles, the answer must be either Yes or No.
A solution I've learnt from the author, russian mathematician Oleg Polubasoff, was rather nice and I've never heard this or like before.
WBR, ...
... to figures today: 4, 6 and 8 - all three, but only one of each. Using these, together with any regular mathematical signs but no other figures or words, you have to make up an expression for each num...
Using just four 4's and standard mathematical symbols, create the number 3.1416 (that's 3.1416 exactly).
[ In TeX notation, answer easily fits in a line of say 60 chars. ] [ So no need for thousands
...t was 16 centimeters (the 'length' of the candy). Sally didn't have a calculator handy, but was good at mathematics, and selected the larger of the two chocolates. Can you show which of the two candie...
...but no other figures at all. Using those four 'sixes', all four of them each time, and also any regular mathematical signs you may require, make up expressions for each number in turn working up from ...
SPOILER
This greenness question is interestingly, a question about the statement of weak duality of nonlinear programming. For the rectangular array: Let us index the rows as x (row_k is x_k) belong
A class of math students at an elementary school near my house was asked by the teacher to sort the digits 0-9 into 3 groups according to RULE A.
About half the class submited the following:
i) 1,
This is taken from http://dailynews.yahoo.com/h/nyt/20010409/tc/why_mathematicians_now_c...
You might want to work on the problem first and then go to the web site to read the rest. Considering how
Here's another mathematically coded message.
Since the last one was solved so quickly, I modified my algorithm. I hope this isn't too easy nor too hard.
(I doubt that I could / would have the pati
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