Hi i am new member of geekinterview and i am very glad to be here. Recently i gone through infosys campus recruitment interview. The question i was asked is something like this:

I was given five(5) coins and asked to arrange the coins in such a way that each coin should touch the other four coins. i was unable to arrange. Can anyone help me in this regard?

Thanking You...

I do not quite understand your question. Can you clarify it?

hi my question is "how do you arrange the 5 coins in such a way that each coin should touch other four?"
something like this:
out of three coins if a arrange the coins triangular then each coin touches other two's.
similarly arrange the five coins.

I think you are not understand his problem..If he told he want to arrange four in that manner then i have a solution...Look at the below image..

In that image all the four coins are touched with other three coins..In that way he want to acheive five coins.

puzzle.jpg

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suresh

it is possible i have done that .

you can check it . in picture it is not touching but in real it touched .

Attached Files

New Microsoft Word Document.doc (26.5 KB, 156 views)

from your arangement i am not sure if both the red coins are touching each other at all.

Hi govindaraj123,

In your attachment, "Pink color coin didn't touch the opposite pink color coin". So it is touch only other three coins..not four coins...

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suresh

Now you can check one more time .

This time i drew somewhat correctly . You don't put coins on table or anyohter .You can do it in air . You see attachement .

Top 2 coins and middle 2 coins inclined little then at a particular point
each coin touch other four . Top 2 coins are not placed on base but i inclined those coins .

Attached Files

coins.doc (30.0 KB, 108 views)

Hi,

The Base level coin never touch the third level coin if all the coins have the same size....Please work out on this...

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suresh

yes yes i mistaken suresh , i tried with two reupee coins . that onle i thought wrong

check the attached doc.

Green and Red coin touching at a point in tilted position
Yellow coins in between red and green coin, each touching other three
Straight line is the fifth coin which is in straight position touching other 4

Try it practically, I did.

Attached Files

Doc1.doc (23.5 KB, 92 views)

the answer is that, you cannot arrange it......(conditon is that, it should be in one plane only but he didnt mentioned)

It is quite simple,

i guess it is easy it they have asked for three right, ok then start arranging first three coins touching each other, keeping them in a triangle touching each other all three, now put this tirangle in between other two, still the problem not solved as the other two coins not touching each other ok right, now clip the two coin edges and put the triangle in between them, thus the problem is solved

ther r so many things to assume here as this is possible only with not too big coin, not too small coins, as if the coin size is too big, you cant arrange it for three itself in a triangle, and if they r too small we cant acheive

if u have threee coins than make a traingle with them than its surface surely touch each other