| Related sites for http://puzzles.nigelcoldwell.co.uk |
| HumorShack Archive of cartoons, riddles with answers and a free mailinglist. | | Jason\'s_Puzzler_Page Small collection of riddles with answers. | | The_Masters_of_Logic The difficulty of the logic puzzles increases until almost unsolvable. The list "The Masters of Logic" shows the solutions. | | MindBreakers Since 1995 free puzzles, riddles, brain teasers, quizes, and games. Fascinating riddles and multipart puzzles. | | OnlyRiddles_com Searchable database of riddles with answers. Accepts visitor submissions and offers an RSS feed. | | Opossum_Sally\'s_Goldenmean Collections of jokes and riddles from penpals. | | Pack_114_Fun_Pages A collection of ten trivial riddles. | | PickandSend A collection of brain teasers, riddles, and logic puzzles. Answers on highlight, sending feature. | | Puzzles_&_Riddles IT experts provide answers to some of the most demanding puzzles and riddles. | | Puzzles_by_Sam_Loyd Ten puzzles from a collection that appeared in various newspapers and magazines over the previous fifty years. | | Random_Riddles A collection of submitted riddles. | | The_Riddle_Contest An online contest for riddle lovers. Expect to encounter a broad array of different puzzle types as well. | | Riddle_of_the_Week Just one question a week. Answer on e-mail. | | Riddle_Planet A contest with twenty-five riddles per each classified round with a money prize for the first person to solve them all. | | RiddleAday Riddles, puzzles and brain teasers to challenge and entertain all ages. [E-mail lists] | | Riddle-Poems,_and_How_to_Make_Them The gentle and literate art of the rhyming riddle. | | Riddles Some challenging riddles to solve. Answers below each of them. | | Riddles_at_Funtestiq Interesting riddles served to you automatically. | | Riddles_com Large riddle database categorized by difficulty. Includes a search feature. | | Scatty_com__Riddles Collection, sorted into lots of categories to amuse, puzzle and test. | | Spreadsheet_Jokes A bunch of riddles on spreadsheet programs. | | Stumpers Math and word riddles, which were created by students in Mrs. Henson's classroom. Includes answers. | | Sureshot_Riddles A fun and challenging collection of logic riddles and sequences. | | Tree_Riddle An old multiple riddle. Identify 65 names of trees. | | Tyfani\'s_Weekly_Riddle Offers mad gab-type riddles with solutions and archives. | | Yan_Koloba Group activity that teaches good character traits, cultural diversity, and team building. | | Coin_Slot_International Trade magazine. | | EuroSlot Amusement industry magazine. | | GameRoom A 68-page monthly publication that covers the world of Pinballs, Jukeboxes, Slot Machines, Soda Machines, Arcade, Classic Arcade Video, and the coin-op collecting hobby. | | Play_Meter_Magazine Monthly trade publication for coin-op, amusement arcade, FEC/LBE operators and owners. | | RePlay_Magazine On-line version of one of coin-ops most respected magazines contains selected stories, game ratings, and up-to-date industry news. | | Vending_Times This magazine has information. on music and games although they specialize more in the other vending business lines. Site only has information. about the magazine and ordering information. | | Beyblade__Let_it_Rip Includes game tips and hints. | | Hasbro__Beyblade Offers customization information, rules, strategy, and questions. | | My_Beyblade_Website Contains rules, pictures and links. | | ROLAZONE_-_The_Glide_Ball_Game_In_The_Tube The home site of Rolazone a new 2 player game with a gravity defying illusion (balls that glide) and an empowering sports science theme (get into 'the zone'). | | Table_Skittles Information on miniaturised table version, including method and rules of the game. | | Table_Skittles_-_History_and_Useful_Information There is no mystery about the origin of the various games of table-top skittles shown on this page. All are miniaturised forms of the larger pub game of Alley Skittles or Nine Pins. Also known as De | | DVS_Systems_Corporation Distributor for video game simulators, vending machines, parts, jukeboxes, air hockey tables, redemption and amusement equipment. Located in the United States. | | Game_Room_Classifieds Free online classifieds to buy, sell, or trade. |
|
Quant riddles and puzzles with answers body {scrollbar-arrow-color: #333333;scrollbar-base-color: #cccccc;scrollbar-dark-shadow-color: #aaaaaa;scrollbar-track-color: #ffffff;} /************************************************ Fold-out external menu- © Dynamic Drive (www.dynamicdrive.com)* This notice must stay intact for use* Visit http://www.dynamicdrive.com/ for full source code***********************************************/var slidemenu_height=500 //specify height of menuvar slidemenu_width=160 //specify width of menu (in pixels)var slidemenu_reveal=8 //specify amount that menu should protrude initiallyvar slidemenu_top=100 //specify vertical offset of menu on pagevar slidemenu_url="menu.htm" //specify path to menu filevar ns4=document.layers?1:0var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1var ns6=document.getElementById&&!document.all?1:0if (ie4||ns6)document.write('')else if (ns4){document.write('\n#slidemenubar{\nwidth:'+slidemenu_width+';}\n\n')document.write('')}function regenerate(){window.location.reload()}function regenerate2(){if (ns4){document.slidemenubar.left=((slidemenu_width-slidemenu_reveal)*-1)document.slidemenubar.visibility="show"setTimeout("window.onresize=regenerate",400)}}window.onload=regenerate2rightboundary=0leftboundary=(slidemenu_width-slidemenu_reveal)*-1if (ie4||ns6){document.write('')themenu=(ns6)? document.getElementById("slidemenubar2").style : document.all.slidemenubar2.style}else if (ns4){document.write('')themenu=document.layers.slidemenubar}function pull(){if (window.drawit)clearInterval(drawit)pullit=setInterval("pullengine()",10)}function draw(){clearInterval(pullit)drawit=setInterval("drawengine()",10)}function pullengine(){if ((ie4||ns6)&&parseInt(themenu.left)leftboundary)themenu.left-=10else if (window.drawit){themenu.left=leftboundaryclearInterval(drawit)}}  ACollection of QuantRiddles With (some)Answers Thequant riddles or logic or lateral puzzles below have been accumulatedfrom the internet and emails that I receive. They are designed to helptraining for job or university interviews or just training your brain.The internet is littered with this kind ofthing but the answers can be a little harder to find so I've thoughtabout all of them and the ones that I know the answer to can be clickedon and have little  at theend. Questions 3 & 5 are probably the easiest and a good placetostart. I've coloured them Red, Amber and Green to indicate VeryHard, Quite Hardand Not so Hard.So that's it good luck.... Thisproblem is actually damn hard, I don't know why I put it first. You aregiven a set of scales and 12marbles. The scales are of the old balance variety. That is, a smalldish hangs from each end of a rod that is balanced in the middle. Thedevice enables you to conclude either that the contents of the dishesweigh the same or that the dish that falls lower has heavier contentsthan the other. The12 marbles appear to be identical. In fact, 11 of them are identical,and one is of a different weight. Your task is to identify the unusualmarble and discard it. You are allowed to use the scales three times ifyou wish, but no more. Notethat the unusual marble may be heavier or lighter than the others. Youare asked to both identify it and determine whether it is heavy orlight. You are givena set of scales and 90 coins. The scales are of the same type as above.You must pay $100 every time you use the scales. The 90coins appear to be identical. In fact, 89of them are identical, and one is of a different weight. Your task isto identify the unusual coin and to discard it while minimizing themaximum possible cost of weighing (another task might be to minimizingthe expected cost of weighing). What is your algorithm to complete thistask? What is the most it can cost to identify the unusual coin? You are a bugsitting in one corner of a cubicroom. You wish to walk (no flying) to the extreme opposite corner (theone farthest from you). Describe the shortest path that you can walk. A mythical citycontains 100,000 married couples butno children. Each family wishes to “continue the maleline”, but theydo not wish to over-populate. So, each family has one baby per annumuntil the arrival of the first boy. For example, if (at some futuredate) a family has five children, then it must be either that they areall girls, and another child is planned, or that there are four girlsand one boy, and no more children are planned. Assume that children areequally likely to be born male or female. Let p(t) be thepercentage of children that are male at the end of year t. How is thispercentage expected to evolve through time? How many degrees(if any) are there in the anglebetween the hour and minute hands of a clock when the time is a quarterpast three? There are 100 lightbulbs lined up in a row in a longroom. Each bulb has its own switch and is currently switched off. Theroom has an entry door and an exit door. There are 100 people lined upoutside the entry door. Each bulb is numbered consecutively from 1 to100. So is each person. Person No. 1 enters the room,switches on every bulb, and exits. Person No. 2enters andflips the switch on every second bulb (turning offbulbs 2, 4,6, …). Person No. 3 enters and flips the switch on everythirdbulb (changing the state on bulbs 3, 6, 9, …). Thiscontinues until all100 people have passed through the room. What is the final state ofbulb No. 64? And how many of the light bulbs are illuminated after the100th person has passed through the room? A windowless roomcontains three identical lightfixtures, each containing an identical light bulb. Each light isconnected to one of three switches outside of the room. Each bulb isswitched off at present. You are outside the room, and the door isclosed. You have one , and only one, opportunity to flip any of theexternal switches. After this, you can go into the room and look at thelights, but you may not touch the switches again. How can you tellwhich switch goes to which light? What is thesmallest positive integer that leaves aremainder of 1 when divided by 2, remainder of 2 when divided by 3, aremainder of 3 when divided by 4, … and a remainder of 9when dividedby 10? In a certainmatriarchal town, the women all believein an old prophecy that says there will come a time when a strangerwill visit the town and announce whether any of the men folks arecheating on their wives. The stranger will simply say“yes” or “no”,without announcing the number of men implicated or their identities. Ifthe stranger arrives and makes his announcement, the women know thatthey must follow a particular rule: If on any day following thestranger’s announcement a woman deduces that her husband isnotfaithful to her, she must kick him out into the street at 10 A.M. thenext day. This action is immediately observable by every resident inthe town. It is well known that each wife is already observant enoughto know whether any man (except her own husband) is cheating on hiswife. However, no woman can reveal that information to any other. Acheating husband is also assumed to remain silent about his infidelity. The time comes, and astranger arrives. He announces that there are cheating men in the town.On the morning of the 10th day following thestranger’sarrival, some unfaithful men are kicked out into the street for thefirst time. How many of them are there? You and I are to play acompetitive game. We shall takeit in turns to call out integers. The first person to call out“50”wins. The rules are as follows: The player whostarts must call out an integer between1 and 10, inclusive; A new number calledout must exceed the most recentnumber called by at least one and by no more than 10. Do you want to go first, andif so, what is your strategy? You are to open asafe without knowing thecombination. Beginning with the dial set at zero, the dial must beturned counter-clockwise to the first combination number, (thenclockwise back to zero), and clockwise to the second combinationnumber, (then counter-clockwise back to zero), and counter-clockwiseagain to the third and final number, where upon the door shallimmediately spring open. There are 40 numbers on the dial, includingthe zero. Without knowing thecombination numbers, what is the maximum number of trials required toopen the safe (one trial equals one attempt to dial a full three-numbercombination)? Inside of a darkcloset are five hats: three blueand two red. Knowing this, three smart men go into the closet, and eachselects a hat in the dark and places it unseen upon his head. Once outside the closet, noman can see his own hat. The first man looks at the other two, thinks,and says, “I cannot tell what colour my hat is.”The second man hearsthis, looks at the other two, and says, “I cannot tell whatcolour myhat is either.” The third man is blind. The blind man says,“Well, Iknow what colour my hat is.” What colour is his hat? You arestanding at the centre of a circular fieldof radius R. The field has a low wire fence around it. Attached to thewire fence (and restricted to running around the perimeter) is a large,sharp-fanged, hungry dog. You can run at speed v, while the dog can runfour times as fast. What is your running strategy to escape the field? You have 52playing cards (26 red, 26 black). You draw cards one by one. A red cardpays you a dollar. A black one fines you a dollar. You can stop anytime you want. Cards are not returned to the deck after being drawn.What is the optimal stopping rule in terms of maximizing expectedpayoff? Also, what is the expected payoff following this optimal rule? Why is that if pis a prime number bigger than 3,then p2-1 is always divisible by 24 with noremainder?  Youhave a chessboard(8×8) plus a big box of dominoes (each 2×1). I usea marker pen to putan “X” in the squares at coordinates (1, 1) and (8,8) - a pair ofdiagonally opposing corners. Is it possible to cover the remaining 62squares using the dominoes without any of them sticking out over theedge of the board and without any of them overlapping? You cannot letthe dominoes stand on their ends. You have astring-like fuse that burns in exactlyone minute. The fuse is inhomogeneous, and it may burn slowly at first,then quickly, then slowly, and so on. You have a match, and no watch.How do you measure exactly 30 seconds? Can the meanof any two consecutive prime numbersever be prime? How manyconsecutive zeros are there at the end of100! (100 factorial). How would your solution change if there problemwere in base 5? How about in Binary???  Howcan this be true????Have a look at the picture (click to enlarge.) All the lines arestraight, the shapes that make up the top picture are the same as theones in the bottom picture so where does the gap come from???? A man is in arowing boat floating on a lake, inthe boat he has a brick. He throws the brick over the side of the boatso as it lands in the water. The brick sinks quickly. The question is,as a result of this does the water level in the lake go up or down? Youhave a 3 and a 5 litre water container, eachcontainer has no markings except for that which gives you it's totalvolume. You also have a running tap. You must use the containers andthe tap in such away as to exactly measure out 4 litres of water. Howis this done? I havethree envelopes, into one of them I puta £20 note. I lay the envelopes out on a table in front of meand allowyou to pick one envelope. You hold but do not open this envelope. Ithen take one of the envelopes from the table, demonstrate to you thatit was empty, screw it up and throw it away. The question is would yourather stick with the envelope you have selected or exchange it for theone on the table. Why? What would be the expected value to you of theexchange? You're afarmer. You're going to a market to buy some animals. On the marketthere are 3 types of animals for sale. You can buy: Horses for£10 each, goats for £1 each and ducks, you get 8 ofthese per bunch and each bunch costs £1. The aim is toacquire 100 animals at the cost of £100, what is thecombination of horses, goats and duck that allows you to do this? (Youmust buy at least one of each.) Adam, Bob,Clair and Dave are out walking: They come to rickety old wooden bridge.The bridge is weak and only able to carry the weight of two of them ata time. Because they are in a rush and the light is fading they mustcross in the minimum time possible and must carry a torch (flashlight,)on each crossing. They only haveone torch and it can't be thrown. Because of their different fitnesslevels and some minor injuries they can all cross at different speeds.Adam can cross in 1 minute, Bob in 2 minutes, Clair in 5 minutes andDave in 10 minutes. Adam, the brainsof the group thinks for a moment and declares that the crossing can becompleted in 17 minutes. There is no trick. How is this done????  A man has built three houses. Nearbythere are gas water and electric plants. The man wishes to connect allthree houses to each of the gas, water and electricity supplies. Unfortunately the pipes and cables must not cross each other. How wouldyou connect connect each of the 3 houses to each of the gas, water andelectricityic supplies??? How manysquares are there on a chessboard?? (the answer is not 64) Can you extend your technique to calculate the number of rectangles ona chessboard. 3men go into a hotel.The man behind the desk said the room is$30 so each man paid $10 and went to the room.A while later the man behind the desk realizedthe room was only $25 so he sent the bellboy to the 3 guys' room with$5.On the way the bellboy couldn't figure outhow to split $5 evenly between 3 men, so he gave each man a $1 and kepttheother $2 for himself.This meant that the 3 men each paid $9 forthe room, which is a total of $27 add the $2 that the bellboy kept =$29. Whereis the other dollar? There were two men having ameal. The first man brought 5 loaves of bread, and the second brought3. Athird man, Ali, came and joined them. They together ate the whole 8loaves. Ashe left Ali gave the men 8 coins as a thank you. The first man saidthat hewould take 5 of the coins and give his partner 3, but the second manrefusedand asked for the half of the sum (i.e. 4 coins) as an equal division.Thefirst one refused. They went to Ali and askedfor the fair solution. Ali told the second man, "I think it is betterforyou to accept your partner's offer." But the man refused and asked forjustice. So Ali said, "then I say that who offered 5 loaves takes 7coins,and who offered 3 loaves takes 1 coin." Canyou explain why this wasactually fair??? Comparecheap loans in the UKwith totallymoney.com UK Loan Companies Loan With Poor Credit Debt Consolidation Loan Lower Rate Loan  This web site iswritten by nigelcoldwell, you can see my main site at freenokia ringtonesif you want to contact me, or have a puzzle forme then feel free to E - Mail me. |
|
