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## Question

13 people where in a room.They decided to shake hands according to these roles:

1- no one shake hand with the same person twice.

2- no one shake hands with anyone who is shorter than him.

3- each hand shake must last exactely 20 seconds.

4- each person in the room should be included.

If they began at (8:00) O`clock p.m.,,,,when they will finish?

howmany shake hands will be totally?

Note:there were no two persons at that room having the same height.

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...and they finish exactly when they began, at 8:00, having completed 0 handshakes.

If no 2 people are exactly the same height, every possible handshake must contain a person who is shorter.

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...and they finish exactly when they began, at 8:00, having completed 0 handshakes.

If no 2 people are exactly the same height, every possible handshake must contain a person who is shorter.

A very fast and correct answer....bravo

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Doesn't Statement 2, 4 and the note (5) make it impossible, since 2 and 5 say that there was no hand shakes and 4 that there were (at least 8)?

Edited by TrueMaja
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I can awkwardly shake my own hand...so since everyone has to shake their own hand to fulfill #4, I'm going with 8:00:20, with 13 handshakes...what an awkward 20 seconds looking around with people shaking their own hands...

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could you please explain it i didn't get it..

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same time... as there is no pair where shorter man is not

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I can awkwardly shake my own hand...so since everyone has to shake their own hand to fulfill #4, I'm going with 8:00:20, with 13 handshakes...what an awkward 20 seconds looking around with people shaking their own hands...

That breaks rule 1, since you're shaking your own hand twice. =P

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