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sirisha25

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Joined: 21 Aug 2006
Posts: 2

 Posted: Tue Oct 03, 2006 3:29 pm    Post subject: Try to solve the puzzles if you can 1.1 1 9 9: Combine the 4 numbers (individually) 1,1,9,9 using only the operators +,-,*,/, and brackets, to form the number 10. 2.Numbers: What would you be buying if the price of 1 was \$1, the price of 12 was \$2, and the price of 166 was \$3? 3.Six oranges and Six boys: You have 6 oranges in a box and 6 boys each of whom would like an orange. How to you divide the 6 oranges amoung the 6 boys without cutting the oranges so that there is still one orange left in the box? 4.Picking Apples If 4 boys can pick 4 apples in 4 minutes, how many boys are needed to pick 100 apples in 100 minutes? 5.In a Circle A number of children are standing in a circle. They are evenly spaced and the 8th child is directly opposite the 18th child. How many children are there altogether? 6.The Carpenter and the Nails A 32" x 32" square metal plate needs to be fixed by a carpenter on to a wooden board. The carpenter uses nails all along the edges of the square such that there are 33 nails on each side of the square. Each nail is at the same distance from the neighboring nails. How many nails does the carpenter use? 7.Mystery Suicide Someone has committed suicide by hanging themselves in a high ceiling room. The is nothing else in the room except for a pool of water on the floor.How did the person commit suicide? 8.Labels You are presented with three closed boxes, labelled "Apples", "Oranges", and "Apples and Oranges". Further, you are told that all the labels are wrong. By looking at a single fruit from one box you can correctly label the three boxes. How? 9.3 Switches You are standing outside the first floor entrance to a building. Next to you is a bank of 3 light switches. One of the switches controls a light bulb in a stock room on the second floor. The other two switches don't control anything. The only way you can check the light on the second floor stock room is to physically walk up the stairs, open the door to the stock room, and check the light. You can do anything to the switches that you want before you walk up the stairs, however you are allowed only one trip up the stairs to check the light. Assuming the light and switches are off to start with, how do you find out which light switch controls the light using only one trip to the room? 10.4 men crossing a bridge There are 4 men who want to cross a bridge. They all begin on the same side. You have 17 minutes to get all of them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either 1 or 2 people, must have the flashlight with them. The flashlight must be walked back and forth, it cannot be thrown, etc. Each man walks at a different speed. A pair must walk together at the rate of the slower man's pace 11.How Many Coconuts Four men and a monkey are stranded on a desert island. They decide to gather coconuts and the next day, they will evenly split the total amoung themselves. The four men work hard all day and by nightfall, they combine the fruits of their labor into a large pile. The men are exhausted after the long day of work and go to bed agreeing to evenly divide the pile of coconuts amoungst themselves the next day. One by one, each man awakens during the night and divides the pile of coconuts into four equal piles with exactly one coconut left over. The man takes one pile for himself and hides them. He gives the one leftover coconut to the monkey. He combines the remaining coconuts into a pile. Each man in turn divides the pile into four equal piles and each time there is one coconut leftover which is given to the monkey. The next day, the four men gather to divide the remaining pile of coconuts into four equal piles and again there is one coconut leftover which is given to the monkey. What is the minimum number of original coconuts? Good Luck. With Smiles Sirisha Always be happy.Keep Smiling.

IQofaGerbil

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Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Tue Oct 03, 2006 4:53 pm    Post subject: Re: Try to solve the puzzles if you can 3. Give 5 boys one orange each, give the 6th boy the last orange but still in the box. 7. He had a block of ice to stand on , which has now melted.
IQofaGerbil

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Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Tue Oct 03, 2006 7:27 pm    Post subject: Re: Try to solve the puzzles if you can 2. Numbers (eg for a gate or door) 4. 4 5. 20 6. 128
IQofaGerbil

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Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Wed Oct 04, 2006 6:58 pm    Post subject: Re: Try to solve the puzzles if you can 8. Select a fruit from the box labelled apples/oranges Whatever you select is must be what is contained in it as it cannot contain both, according to the rules So if for example you select an orange then that is the correct label to put on it. The box labelled apples can only possibly contain apples/oranges or oranges. As we now know that it does not contain oranges then it must contain apples/oranges The final box labelled oranges therefore contains apples
IQofaGerbil

Active User

Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Thu Oct 05, 2006 12:25 am    Post subject: Re: Try to solve the puzzles if you can 10. not sure how anyone can work this one out if we do not know how fast each man can walk??????
IQofaGerbil

Active User

Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Thu Oct 05, 2006 1:06 am    Post subject: Re: Try to solve the puzzles if you can 11. 765 9. set the first switch on for a good time say two minutes then set it off set the 2nd switch on for 10 seconds then set it off set the third switch on and leave it on now go up quickly to the room if the light is on then the 3rd switch controls the light if the light is off then feel it if it is cool then the 2nd switch controls it if it is hot then the 1st switch controls it
DavidatK

Active Member

Joined: 22 Nov 2005
Posts: 700
Location: Troy, Michigan USA

Posted: Thu Oct 05, 2006 1:44 am    Post subject: Re: Try to solve the puzzles if you can

 Sirisha wrote: 6.The Carpenter and the Nails

I can see two solutions for this problem:

1 - 128 nails spaces 1" apart with one nail in each corner, thereby, the corner nails are counted on each side of the square.

2 - 132 nails spaces .9696... inches apart with the first nail on each side .4848... inches from the corner. This assumes that the distance between nails are measured along the edge of the metal place. This solution would be, however more difficult than #1 to determine the .9696... inch measurement.

Dave
sirisha25

New User

Joined: 21 Aug 2006
Posts: 2

 Posted: Thu Oct 05, 2006 12:30 pm    Post subject: Hi IQofaGerbil, U r correct for 3,5,6,7,8,9 answers.Try out for the other. Sorry i have not given the time for each man to walk here is the question again. 10. 4 men crossing a bridge There are 4 men who want to cross a bridge. They all begin on the same side. You have 17 minutes to get all of them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either 1 or 2 people, must have the flashlight with them. The flashlight must be walked back and forth, it cannot be thrown, etc. Each man walks at a different speed. A pair must walk together at the rate of the slower man's pace. Man 1: 1 minute to cross Man 2: 2 minutes to cross Man 3: 5 minutes to cross Man 4: 10 minutes to cross For example if Man 1 and Man 4 walk across first. 10 minutes have elapsed when they get to the other side of the bridge. If Man 4 returns with the flashlight. A total of 20 minutes have passed and you have failed the mission. Hi David, Here is the simply way to answer it. The four corners of the square have one nail each. Each side of the square now requires 31 nails (excluding the four corners). Thus, Total number of nails used = 4 + (4 x 31) = 128.
IQofaGerbil

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Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Thu Oct 05, 2006 5:16 pm    Post subject: Re: Try to solve the puzzles if you can 10 Men 1 and 2 cross the bridge (elapsed time 2 minutes) Man 1 returns (elapsed time 3 minutes) Men 3 and 4 cross the bridge (elapsed time 13 minutes) Man 2 returns (elapsed time 15 minutes) Men 1 and 2 cross the bridge (elapsed time 17 minutes).
IQofaGerbil

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Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Fri Oct 06, 2006 1:50 am    Post subject: Re: Try to solve the puzzles if you can 11. 1021
mmwife

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Joined: 30 May 2003
Posts: 1592

 Posted: Sun Dec 17, 2006 10:16 pm    Post subject: 2. You bought shares in the same stock I bought, but you bought it 1..2..3 weeks after I did.

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Joined: 31 Mar 2005
Posts: 436
Location: chennai, India

 Posted: Tue Dec 19, 2006 6:51 am    Post subject: the answer for last puzzle is 1021 coconuts Eqation will be (((((x*4+1)* 4/3+1)*4/ 3+1)*4/3+ 1)*4/3+1) =y which yields to 1024x+781=81y Here both x and y are whole numbers its an equation with 2 variables. Hence can be solved by trial and error Accordingly x = 80 and y = 1021 Initially 1021 coconuts Initially 1021 765 573 429 After giving one cocnut to monkey 1020 764 572 428 Person removing his share 255 191 143 107 remaining coconuts 765 573 429 321 Each distributes 80 coconuts among themselves and remaining 1 coconut to monkey. cheers, krish
IQofaGerbil

Active User

Joined: 05 May 2006
Posts: 183
Location: Scotland

 Posted: Tue Dec 19, 2006 5:11 pm    Post subject: Re: Try to solve the puzzles if you can I'm glad that you agree with me, radhakrishnan82 although I apologise for not posting the details!

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Joined: 31 Mar 2005
Posts: 436
Location: chennai, India

 Posted: Wed Dec 20, 2006 5:18 am    Post subject: 1. (1+1/9)*9 = 10
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