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Puzzles FAQ



Frequently Asked Questions about Puzzles.

This FAQ about Puzzles was compiled and written by Chris Cole chris@questrel.questrel.com and Matthew Daly mwdaly@pobox.com with numerous contributions by others.

-01 What You Should Do Before You Post A Puzzle (rec.puzzles)
If the puzzle that you want to post came from a photocopy, or an e-mail ...
-02 Frequently Asked Puzzles (specific)
This section contains, short summaries of the most commonly occurring ...
-03 ==> balance <== [logic/part5] (Frequently Asked Puzzles - specific)
You have 12 coins, one of which is counterfeit. The counterfeit ...
-04 ==> gry <== [language/part2] (Frequently Asked Puzzles - specific)
What are the three common English words that end in -GRY?...
-05 ==> oldest.girl <== [probability] (Frequently Asked Puzzles - specific)
If a person has two children, and truthfully answers yes to the ...
-06 ==> monty.hall <== [decision] (Frequently Asked Puzzles - specific)
You're about to play on a game show. There are three doors; behind one ...
-07 ==> fork.two.men <== [logic/part4] (Frequently Asked Puzzles - specific)
Two men stand at a fork in the road. One fork leads to Heaven; the ...
-08 ==> bridge.crossing <== [decision/crossing] (Frequently Asked Puzzles - specific)
Four men are on one side of a rickety bridge on a dark night. The ...
-09 Who keeps the fish? (Frequently Asked Puzzles - specific)
This is a quiz written by Einstein in the last century. He said that 98%...
-10 ==> situation.puzzles <== [logic/part3 and logic/part4] (Frequently Asked Puzzles - general)
A man walks into a bar, asks for a drink, the bartender points a gun ...
-11 Sequence puzzles (Frequently Asked Puzzles - general)
-12 English language records (Frequently Asked Puzzles - general)
What's the shortest sentence with all 26 letters? ==> pangram ...
-13 Paradoxes (Frequently Asked Puzzles - general)
==> unexpected <== [logic/part5]...
-14 The Equation Analysis Test (Frequently Asked Puzzles - general)
-15 General Posting Guidelines (rec.puzzles)
This section describes several specific aspects of the culture ...
-16 Posting puzzle solutions (rec.puzzles)
When someone posts a puzzle that you know the solution to, or better yet,...
-17 ObPuzzles
A facet of rec.puzzles culture that comes from the early days ...
-18 Sport-flaming (rec.puzzles)
One of the entertaining pastimes of rec.puzzles is sport-flaming, ...
-19 The rec.puzzles Archive
The rec.puzzles archive is a treasure trove of puzzles and ...
-20 The e-mail archive server (rec.puzzles)
The easiest way to figure out the archive is to get and read the index....
-21 Getting to the archive by Internet, FTP, gopher, or WAIS (rec.puzzles)
-22 The rec.puzzles Oracle
This is a group of rec.puzzles regulars, who are familiar with ...
-23 Credit Where Credit Is Due (rec.puzzles)
The first rec.puzzles FAQ was written by Tom Magliery. Many thanks to ...
-24 Instructions for Accessing rec.puzzles Archive
-25 analysis/bicycle.p
A boy, a girl and a dog go for a 10 mile walk. The boy and girl ...
-26 analysis/boy.girl.dog.p
-27 analysis/bugs.p
-28 analysis/c.infinity.p
-29 analysis/cache.p
-30 analysis/calculate.pi.p
How can I calculate many digits of pi?...
-31 analysis/cats.and.rats.p
-32 analysis/dog.p
-33 analysis/e.and.pi.p
-34 analysis/functional/distributed.p
-35 analysis/functional/linear.p
-36 analysis/integral.p
-37 analysis/irrational.stamp.p
-38 analysis/minimum.time.p
-39 analysis/particle.p
-40 analysis/period.p
-41 analysis/rubberband.p
-42 analysis/sequence.p
-43 analysis/snow.p
-44 analysis/tower.p
-45 arithmetic/7-11.p
A customer at a 7-11 store selected four items to buy, and was ...
-46 arithmetic/arithmetic.progression.p
-47 arithmetic/clock/day.of.week.p
-48 arithmetic/clock/palindromic.p
-49 arithmetic/clock/reversible.p
-50 arithmetic/clock/right.angle.p
-51 arithmetic/clock/thirds.p
-52 arithmetic/consecutive.composites.p
-53 arithmetic/consecutive.product.p
-54 arithmetic/conway.p
-55 arithmetic/digits/6.and.7.p
-56 arithmetic/digits/all.ones.p
-57 arithmetic/digits/arabian.p
-58 arithmetic/digits/circular.p
-59 arithmetic/digits/divisible.p
-60 arithmetic/digits/equations/123456789.p
-61 arithmetic/digits/equations/1992.p
-62 arithmetic/digits/equations/24.p
-63 arithmetic/digits/equations/383.p
-64 arithmetic/digits/equations/find.p
-65 arithmetic/digits/extreme.products.p
-66 arithmetic/digits/labels.p
-67 arithmetic/digits/nine.digits.p
-68 arithmetic/digits/palindrome.p
-69 arithmetic/digits/palintiples.p
-70 arithmetic/digits/power.two.p
-71 arithmetic/digits/prime/101.p
-72 arithmetic/digits/prime/all.prefix.p
-73 arithmetic/digits/prime/change.one.p
-74 arithmetic/digits/prime/prefix.one.p
-75 arithmetic/digits/reverse.p
-76 arithmetic/digits/rotate.p
-77 arithmetic/digits/sesqui.p
-78 arithmetic/digits/squares/change.leading.p
-79 arithmetic/digits/squares/length.22.p
-80 arithmetic/digits/squares/length.9.p
-81 arithmetic/digits/squares/twin.p
-82 arithmetic/digits/sum.of.digits.p
-83 arithmetic/digits/zeros/million.p
-84 arithmetic/digits/zeros/trailing.p
-85 arithmetic/pell.p
-86 arithmetic/subset.p
-87 arithmetic/sum.of.cubes.p
-88 arithmetic/sums.of.powers.p
-89 arithmetic/tests.for.divisibility/eleven.p
-90 arithmetic/tests.for.divisibility/nine.p
-91 arithmetic/tests.for.divisibility/seven.p
-92 arithmetic/tests.for.divisibility/three.p
-93 combinatorics/alphabet.blocks.p
-94 combinatorics/coinage/combinations.p
-95 combinatorics/coinage/dimes.p
-96 combinatorics/coinage/impossible.p
-97 combinatorics/color.p
-98 combinatorics/full.p
-99 combinatorics/gossip.p
-100 combinatorics/grid.dissection.p
-101 combinatorics/permutation.p
-102 combinatorics/subsets.p
-103 combinatorics/transitions.p
-104 competition/contests/games.magazine.p
-105 competition/contests/national.puzzle/npc.1993.p
-106 competition/games/bridge.p
-107 competition/games/chess/knight.control.p
-108 competition/games/chess/knight.most.p
-109 competition/games/chess/knight.tour.p
-110 competition/games/chess/queen.control.p
-111 competition/games/chess/queen.most.p
-112 competition/games/chess/queens.p
-113 competition/games/chess/rook.paths.p
-114 competition/games/chess/size.of.game.tree.p
-115 competition/games/cigarettes.p
-116 competition/games/connect.four.p
-117 competition/games/craps.p
-118 competition/games/crosswords.p
-119 competition/games/cube.p
-120 geometry/coloring/cheese.cube.p
A cube of cheese is divided into 27 subcubes. A mouse starts at ...
-121 competition/games/go-moku.p
-122 competition/games/hi-q.p
-123 competition/games/jeopardy.p
-124 competition/games/nim.p
-125 competition/games/online/unlimited.adventures.p
-126 competition/games/othello.p
-127 competition/games/pc/best.p
-128 competition/games/pc/reviews.p
-129 competition/games/pc/solutions.p
-130 competition/games/poker.face.up.p
-131 competition/games/risk.p
-132 competition/games/rubiks/rubiks.clock.p
-133 competition/games/rubiks/rubiks.cube.p
-134 competition/games/rubiks/rubiks.magic.p
-135 competition/games/scrabble.p
-136 competition/games/set.p
-137 competition/games/soma.p
-138 competition/games/square-1.p
-139 competition/games/think.and.jump.p
-140 competition/games/tictactoe.p
-141 competition/tests/analogies/long.p
-142 competition/tests/analogies/pomfrit.p
-143 competition/tests/analogies/quest.p
-144 competition/tests/math/putnam/putnam.1967.p
-145 competition/tests/math/putnam/putnam.1987.p
-146 competition/tests/math/putnam/putnam.1988.p
-147 competition/tests/math/putnam/putnam.1990.p
-148 competition/tests/math/putnam/putnam.1992.p
-149 decision/allais.p
-150 decision/division.p
-151 decision/dowry.p
-152 decision/envelope.p
-153 decision/exchange.p
-154 decision/high.or.low.p
-155 decision/monty.hall.p
-156 decision/newcomb.p
-157 decision/prisoners.p
-158 decision/red.p
-159 decision/rotating.table.p
-160 decision/stpetersburg.p
-161 decision/truel.p
-162 geometry/K3,3.p
-163 geometry/bear.p
-164 geometry/bisector.p
-165 geometry/calendar.p
-166 geometry/circles.and.triangles.p
-167 geometry/coloring/cheese.cube.p
-168 geometry/coloring/triominoes.p
-169 geometry/construction/4.triangles.6.lines.p
-170 geometry/construction/5.lines.with.4.points.p
-171 geometry/construction/square.with.compass.p
-172 geometry/corner.p
-173 geometry/cover.earth.p
-174 geometry/cycle.polynomial.p
-175 geometry/dissections/disk.p
-176 geometry/dissections/hexagon.p
-177 geometry/dissections/largest.circle.p
-178 geometry/dissections/square.70.p
-179 geometry/dissections/square.five.p
-180 geometry/dissections/tesseract.p
-181 geometry/duck.and.fox.p
-182 geometry/earth.band.p
-183 geometry/fence.p
-184 geometry/hike.p
-185 geometry/hypercube.p
-186 geometry/kissing.number.p
-187 geometry/konigsberg.p
-188 geometry/ladders.p
-189 geometry/lattice/area.p
-190 geometry/lattice/equilateral.p
-191 geometry/manhole.cover.p
-192 geometry/pentomino.p
-193 geometry/revolutions.p
-194 geometry/rotation.p
-195 geometry/shephard.piano.p
-196 geometry/smuggler.p
-197 geometry/spiral.p
-198 geometry/table.in.corner.p
-199 geometry/tetrahedron.p
-200 geometry/tiling/count.1x2.p
-201 geometry/tiling/scaling.p
-202 geometry/tiling/seven.cubes.p
-203 geometry/topology/fixed.point.p
-204 geometry/touching.blocks.p
-205 geometry/tiling/scaling.p
-206 geometry/tiling/seven.cubes.p
-207 geometry/topology/fixed.point.p
-208 geometry/trigonometry/euclidean.numbers.p
-209 geometry/trigonometry/inequality.p
-210 group/group.01.p
-211 group/group.01a.p
-212 group/group.02.p
-213 group/group.03.p
-214 group/group.04.p
-215 group/group.05.p
-216 group/group.06.p
-217 group/group.07.p
-218 group/group.08.p
-219 group/group.09.p
-220 group/group.10.p
-221 group/group.11.p
-222 group/group.12.p
-223 group/group.13.p
-224 group/group.14.p
-225 group/group.15.p
-226 group/group.16.p
-227 group/group.17.p
-228 induction/handshake.p
-229 language/close.antonyms.p
-230 language/dutch/dutch.record.p
-231 language/english/equations.p
-232 language/english/etymology/acronym.p
-233 language/english/etymology/fossil.p
-234 language/english/etymology/portmanteau.p
-235 language/english/frequency.p
-236 language/english/idioms.p
-237 language/english/less.ness.p
-238 language/english/letter.rebus.p
-239 language/english/malaprop.p
-240 language/english/piglatin.p
-241 language/english/pleonasm.p
-242 language/english/plurals/collision.p
-243 language/english/plurals/doubtful.number.p
-244 language/english/plurals/drop.terminal.p
-245 language/english/plurals/endings.p
-246 language/english/plurals/man.p
-247 language/english/plurals/switch.first.p
-248 language/english/potable.color.p
-249 language/english/pronunciation/autonym.p
-250 language/english/pronunciation/homograph/different.pronunciation.p
-251 language/english/pronunciation/homograph/homographs.p
-252 language/english/pronunciation/homophone/homophones.alphabet.p
-253 language/english/pronunciation/homophone/homophones.letter.p
-254 language/english/pronunciation/homophone/homophones.most.p
-255 language/english/pronunciation/homophone/trivial.p
-256 language/english/pronunciation/oronym.p
-257 language/english/pronunciation/phonetic.letters.p
-258 language/english/pronunciation/rhyme.p
-259 language/english/pronunciation/silent.letter.p
-260 language/english/pronunciation/silent.most.p
-261 language/english/pronunciation/syllable.p
-262 language/english/pronunciation/telegrams.p
-263 language/english/puns.p
-264 language/english/rare.trigraphs.p
-265 language/english/self.ref/self.ref.letters.p
-266 language/english/self.ref/self.ref.numbers.p
-267 language/english/self.ref/self.ref.words.p
-268 language/english/sentences/behead.p
-269 language/english/sentences/charades.p
-270 language/english/sentences/emphasis.p
-271 language/english/sentences/pangram.p
-272 language/english/sentences/repeated.words.p
-273 language/english/sentences/sentence.p
-274 language/english/sentences/snowball.p
-275 language/english/sentences/weird.p
-276 language/english/sentences/word.boundaries.p
-277 language/english/spelling/gry.p
-278 language/english/spelling/j.ending.p
-279 language/english/spelling/lipograms.p
-280 language/english/spelling/longest.p
-281 language/english/spelling/most.p
-282 language/english/spelling/near.palindrome.p
-283 language/english/spelling/operations.on.words/deletion.p
-284 language/english/spelling/operations.on.words/insertion.and.deletion.p
-285 language/english/spelling/operations.on.words/insertion.p
-286 language/english/spelling/operations.on.words/movement.p
-287 language/english/spelling/operations.on.words/substitution.p
-288 language/english/spelling/operations.on.words/transposition.p
-289 language/english/spelling/operations.on.words/words.within.words.p
-290 language/english/spelling/palindromes.p
-291 language/english/spelling/sets.of.words/ladder.p
-292 language/english/spelling/sets.of.words/nots.and.crosses.p
-293 language/english/spelling/sets.of.words/perfect.ladder.p
-294 language/english/spelling/sets.of.words/squares.p
-295 language/english/spelling/sets.of.words/variogram.p
-296 language/english/spelling/sets.of.words/word.torture.p
-297 language/english/spelling/single.words.p
-298 language/english/spoonerisms.p
-299 language/english/synonyms/ambiguous.p
-300 language/english/synonyms/antonym.p
-301 language/english/synonyms/contradictory.proverbs.p
-302 language/english/synonyms/contranym.p
-303 language/finnish/finnish.plural.p
-304 language/finnish/finnish.record.p
-305 language/french/french.palindromes.p
-306 language/french/french.record.p
-307 language/german/german.palindromes.p
-308 language/german/german.record.p
-309 language/italian/italian.record.p
-310 language/multi.palindromes.p
-311 language/norwegian/norwegian.record.p
-312 language/repeated.word.p
-313 language/swedish/swedish.record.p
-314 language/synonymous.reversals.p
-315 language/vowels.repeated.p
-316 logic/29.p
-317 logic/ages.p
-318 logic/attribute.p
-319 logic/bookworm.p
-320 logic/boxes.p
-321 logic/camel.p
-322 logic/centrifuge.p
-323 logic/chain.p
-324 logic/children.p
-325 logic/condoms.p
-326 logic/dell.p
-327 logic/elimination.p
-328 logic/flip.p
-329 logic/flowers.p
-330 logic/friends.p
-331 logic/hofstadter.p
-332 logic/hundred.p
-333 logic/inverter.p
-334 logic/josephine.p
-335 logic/locks.and.boxes.p
-336 logic/min.max.p
-337 logic/mixing.p
-338 logic/monty.52.p
-339 logic/number.p
-340 logic/riddle.p
-341 logic/river.crossing.p
-342 logic/ropes.p
-343 logic/self.ref.p
-344 logic/situation.puzzles.p
-345 logic/smullyan/black.hat.p
-346 logic/smullyan/fork.three.men.p
-347 logic/smullyan/fork.two.men.p
-348 logic/smullyan/integers.p
-349 logic/smullyan/painted.heads.p
-350 logic/smullyan/priest.p
-351 logic/smullyan/stamps.p
-352 logic/supertasks.p
-353 logic/timezone.p
-354 logic/unexpected.p
-355 logic/verger.p
-356 logic/weighing/balance.p
-357 logic/weighing/box.p
-358 logic/weighing/find.median.p
-359 logic/weighing/gummy.bears.p
-360 logic/weighing/optimal.weights.p
-361 logic/weighing/weighings.p
-362 logic/zoo.p
-363 physics/balloon.p
-364 physics/brick.p
-365 physics/bubbles.p
-366 physics/cannonball.p
-367 physics/magnets.p
-368 physics/milk.and.coffee.p
-369 physics/mirror.p
-370 physics/monkey.p
-371 physics/pole.in.barn.p
-372 physics/resistors.p
-373 physics/sail.p
-374 physics/skid.p
-375 physics/spheres.p
-376 physics/wind.p
-377 pickover/pickover.01.p
-378 pickover/pickover.02.p
-379 pickover/pickover.03.p
-380 pickover/pickover.04.p
-381 pickover/pickover.05.p
-382 pickover/pickover.06.p
-383 pickover/pickover.07.p
-384 pickover/pickover.08.p
-385 pickover/pickover.09.p
-386 pickover/pickover.12.p
-387 pickover/pickover.13.p
-388 pickover/pickover.14.p
-389 pickover/pickover.15.p
-390 pickover/pickover.16.p
-391 pickover/pickover.17.p
-392 pickover/pickover.18.p
-393 probability/amoeba.p
-394 probability/apriori.p
-395 probability/bayes.p
-396 probability/birthday/line.p
-397 probability/birthday/same.day.p
-398 probability/cab.p
-399 probability/coupon.p
-400 probability/darts.p
-401 probability/derangement.p
-402 probability/family.p
-403 probability/flips/once.in.run.p
-404 probability/flips/twice.in.run.p
-405 probability/flips/unfair.p
-406 probability/flips/waiting.time.p
-407 probability/flush.p
-408 probability/hospital.p
-409 probability/icos.p
-410 probability/intervals.p
-411 probability/killers.and.pacifists.p
-412 probability/leading.digit.p
-413 probability/lights.p
-414 probability/lottery.p
-415 probability/oldest.girl.p
-416 probability/particle.in.box.p
-417 probability/pi.p
-418 probability/random.walk.p
-419 probability/reactor.p
-420 probability/roulette.p
-421 probability/transitivity.p
-422 real-life/icecubes.p
-423 real-life/microwave.p
-424 references/books/bloopers.p
-425 references/books/masquerade.p
-426 references/books/maze.p
-427 references/books/treasure.p
-428 references/books/unnamed.p
-429 references/faq.p
-430 references/magazines.p
-431 references/organizations.p
-432 series/series.00.p
-433 series/series.01.p
-434 series/series.02.p
-435 series/series.03.p
-436 series/series.03a.p
-437 series/series.03b.p
-438 series/series.03c.p
-439 series/series.04.p
-440 series/series.05.p
-441 series/series.06.p
-442 series/series.06a.p
-443 series/series.07.p
-444 series/series.08a.p
-445 series/series.08b.p
-446 series/series.09a.p
-447 series/series.09b.p
-448 series/series.10.p
-449 series/series.11.p
-450 series/series.12.p
-451 series/series.13.p
-452 series/series.14.p
-453 series/series.14a.p
-454 series/series.15.p
-455 series/series.16.p
-456 series/series.17.p
-457 series/series.18.p
-458 series/series.19.p
-459 series/series.20.p
-460 series/series.21.p
-461 series/series.22.p
-462 series/series.23.p
-463 series/series.24.p
-464 series/series.25.p
-465 series/series.26.p
-466 series/series.27.p
-467 series/series.28.p
-468 series/series.29.p
-469 series/series.30.p
-470 series/series.31.p
-471 series/series.32.p
-472 series/series.33.p
-473 series/series.34.p
-474 series/series.35.p
-475 series/series.36.p
-476 series/series.37.p
-477 trivia/area.codes.p
-478 trivia/body.parts.p
-479 trivia/coincidence.p
-480 trivia/federal.reserve.p
-481 trivia/memory.tricks.p
-482 trivia/quotations.p









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