form
you have 18 matchsticks that form 9 equal-sized triangles, you remove 5 sticks to form 5 equal-sized triangles. Which five do you remove?
...nclosed (no paths to the outside). I mentioned creating a room with a triangular base using five cubes (formed by using two cubes to form the 'floor' and 'roof' and three cubes to ...
... it did, but I recently discovered that I made a mistake and my 'solution' doesn't quite form a square. In order to form a square, the angles of the triangle that was removed must be 90...
Here is a third solution shown below.
wrote:
3. Lay the third match on top the first to form a machinists square.
No, an infinitely small object would not be able to reflect any light or other wave form so the microscope would have nothing to 'see'.
Lettuce is frequently sold in chopped form, mixed with other salad produce. I think that has to count as processing, doesn't it?
...c = 24 (or something like that):
paleontologists have discovered in china a fossil...
This is a form of plaintext autokey, if you're trying to find a classification for your invention....
...his poster must've forgotten to mention that the sum is13, although the puzzle is too easy in that form, anyhow....
...res differing by 100.
Let’s look at rational square sequences. I believe that they must be of the form [n(a^2-b^2-2ab)]^2, [n(a^2+b^2)]^2, and [n(a^2-b^2+2ab)]^2 for any integers a and b and any...
...ndom, sequential, base 10, positive integers below 10,000.
What is the probability that they do not form part of a known sequence which can be generated by any sensible means.
?
Kev...
...ale' . This means that there are 16 (2^4) possible pieces. I want to select 9 of these 16 pieces to form the puzzle (every piece will be different when orientation is considered). Each piece alway...
...uld you write it like that - granted it makes it very easy to see the pattern, but it is no longer in a form that can be plugged straight into a decrypter to verify. Would I have been better writing i...
...e angle where the cord intersects the arc should be 60 degrees.
SQUARE: take the three segments and form (by overlapping the arcs that exceed the largest inscribed 30-120-30 degree triangles withi...
...Al was trying to make (unless I've misintrepeted his reply) was that it's generally 'bad form' to have to rely on calculated answers to plug into a later expression, if you can avo...
... whose physical characteristics do not permit this):
Take a cubical shell of minute (but finite) uniform thickness; its interior of edge 2 units (with sphere radius 1 unit), and its exterior edge ...
... have 1137 for the game today. Using all four digits each time, one of each but no other digits at all, form expressions for consecutive numbers from one up.
Any arithmetical signs may be used, b...
What about solutions using no characters being rotated to form other characters?
Tendou Nabiki sold me a photo of the gorgeous, Jusenkyou cursed Jim Waters standing under a digital clock reading &...
... That 'R' should be a 'B', I guess.
SPOILER below...
SPOILER:
The coded form consists of all the first letters of the words followed by the second letters, et cetera, m...
...following shape :
OOOO O
(each 'O' represents a cube)
the aim of the puzzle is to form a big cube of size 5 x 5 x 5.
I don't know the solution (but there is one, since t...
...hat change happens to the bubbles? Are there more, or less of them? Are they larger or smaller? Do they form deeper down in the bottle, or closer to the surface? Or none of the above?...
The rhyming dictionary included rhymes for both for the verb and noun form of 'present'. I removed all of the words starting with 'p'. I believe that 'crescent' was not g...
Draw a pentagon and place 5 pennies where the sides meet. Extend the sides to form a five pointed star. Place the other 5 pennies at the 5 points of the star and we have 5 rows with 4 pennies in each ...
... described in them were really fun to read!
Lately, there have been a lot of puzzles phrased in the form 'Prove that for any random number R, between N and K, that the upper limit of probabil...
...n the footsteps of J.A.H.Hunter we have aaaa for the game today. Using no more than four a-s each time form expressions for consecutive numbers from one up.
Any arithmetical sign may be used, inc...
...wledge it. That is indeed heresy. I think we can still achieve the desired effect with something of the form 'The great god Ubizmo is a total wimp.' This isn't profane, since it uses Ub...
...ple X_1, ... X_n from a normal distribution with unknown mean m and variance v. Among estimators of the form T(k) = k*sum[(X_i - sum(X_i)/n)^2], which value of k minimizes the mean squared error E(T(k...
...t says that the proportion beginning with 1 should be log_10(2) is based on the ranges all being of the form [1..n], where n is a 'random' fairly large positive integer.
In practice, som...
...placed in the middle of one side.
? 8 ? ? ? ? ? ? ?
Fractions may be used. But the numbers must form a series with a constant difference between successive numbers. There are many ways of doin...
.... He then wants to cut the remaining three-quarters of the board into pieces, and arrange the pieces to form a 60 by 60 inch square. How can the carpenter accomplish this while using the minimum numbe...
...e four figures of 1959. Using all four of them each time, but with no other figures at all, you have to form expressions for the successive numbers from 'one' upwards. Any regular arithmetic...
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