1. ## handshakes....

At a Party, all the members shook hands with other members. There were 91 hankshakes. So howmany members are there ?

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suresh

2. ## Re: handshakes....

Originally Posted by psuresh1982
At a Party, all the members shook hands with other members. There were 91 hankshakes. So howmany members are there ?

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suresh
i guess the answer is 182...

4. ## Re: handshakes....

Yes sutnarcha..You are absolutely correct...can you post your solution ?
It will help to other...

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suresh

5. ## Re: handshakes....

I used the following formulae

ε (x-1,x-2,x-3…….2)=91

here,
ε is sum of (sigma).
x is number of members, unknown.
The series is only till 2 because we need at least 2 members to shake hands.
91 is given.
Its not so easy, took some time for me.

6. ## Re: handshakes....

i have one more equation....

n(n+1)/2=91.

If you simply this one, you will get the answer 13. You will add one more to this result...13+1 = 14. Because inital handshake coming from two members..

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suresh

7.

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