+64 Six couples were at a party. If each person shakes hands with everybody except his spouse, how many handshakes take place?
+118653 man 1 10 shakes then he is out
man 2 9 shakes then out
man 3 8 shakes then out
man4 7 shakes then out
man5 6 shakes then out
last man 5 shakes then out
woman1 5 shakes
..
woman 5 1 shake
total
10+9+8+7+6+5 +5+4+3+2+1 = 60 handshakes
