Thirteen guests has participated in a dinner. The number of handshakes happened
in the dinner is
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1
Answer:
6 is the answer and 1 hand extra = 7
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78 handshakes happened in the dinner
Explanation:
There are 13 members participated in the dinner party. Number 13 had hand shaken with the rest of the 12 member and number 12 had hand shaken with the rest of the 11 member, as he already had hand shaken with number 13. Number 11 had hand shaken with rest of the 10 members as he already had hand shaken with 13 and 12. In the same way for every person it happened so, 12+11+10+9+8+7+6+5+4+3+2+1=78.
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