Krishna Kutty
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Aren't there more?2 squares can make a rectangle.That will give two more rectangles. If you have counted thaem, then it's probably the longer rectangles made by 2rectangles+2squares on the same line that you have missed. That will make the answer 20!(won't it)
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I see that i got the question wrong! See my spoiler and you can see what i thought would be pair wise separation!
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Use spoilers buddy! The 'S' option!! Thanks for that.Could you please tell me how to upload an image-just to make my answer more clear?I created a picture,but gave the answer without it because i couldn't find a way to attatch it! Thanks again for your help.
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I think this might be right. Suppose M<N. Then, keeping one policeman each at the junctions along the diagonal of a square of side M will take care of M number of streets. And N-M policemen are required who can stand at any point on streets from east to west which does not belong to the M*M square.
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I have 3 friends,right?So then, including me, there are 4 people in total.So i can give 4 chocolates each to my friends and keep 4 chocolates with me! (This is the very first answer i am giving.I suppose i am the latest member here!)
