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 English interview questions  English Interview Questions (464)
 General Aptitude interview questions  General Aptitude Interview Questions (1897)
 Puzzles interview questions  Puzzles Interview Questions (460)
Question
12 members were present at a board meeting. Each member
shook hands with all of the other members before & after the
meeting. 

How many hand shakes were there?
 Question Submitted By :: Puzzles
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
132

Think of it this way: the first person shakes hands with 11
people, the second person also shakes hands with 11 people,
but you only count 10, because the hand shake with the first
person was already counted. Then add 9 for the third person,
8 for the fourth, & so on.

66 hand shakes took place before & 66 after the meeting, for
a total of 132.
 
Is This Answer Correct ?    39 Yes 4 No
Guest
 
Answer
# 2
For n nuimber of persons shaking hands with each other,
total no of handshakes are n(n-1)/2.
Hence for 12 people itis 12(12-1)/2= 66
Thus total handshakes = 2*66=132
 
Is This Answer Correct ?    33 Yes 2 No
Ajay Maurya
 
 
 
Answer
# 3
For n nuimber of persons shaking hands with each other,
total no of handshakes are n(n-1)/2.
Hence for 12 people itis 12(12-1)/2= 66
Thus total handshakes = 2*66=132
 
Is This Answer Correct ?    14 Yes 0 No
Raj
 
Answer
# 4
132.........

thank u
 
Is This Answer Correct ?    12 Yes 1 No
Vignesh1988i
 
Answer
# 5
For n nuimber of persons shaking hands with each other,
total no of handshakes are n(n-1)
Thus total handshakes =12(12-1)=132
 
Is This Answer Correct ?    4 Yes 2 No
Saurabh Sukhija
 

 
 
 
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