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55 PeopleHandshakes10213346510615721828936104511551266
3.14159265358979323846264338327950288419716939937510...3 is the ninth number to the right of the decimal place.5 is the ninth number in the series if you count the initial 3.(The first 50 to the right of the decimal place is shown for context.)
1000*999/2 = 499500
Seven different people get together in a place. Each person should handshake only once with all others. Find the total number of handshakes? the first one handshake with 6 person, and second one handshake with remaining 5, and so on....6+5+4+3+2+1=21
2.8 multiplied by 10 to yhe ninth power is 2,800,000,000. To arrive at this answer you'd move the decimal point to the right nine times adding zeroes as place holders, not to be confused with adding nine zeroes.