Sunday

September 21, 2014

September 21, 2014

Posted by **Rhegan** on Monday, January 25, 2010 at 8:53pm.

- 7th grade -
**bobpursley**, Monday, January 25, 2010 at 9:04pmIf there are N folks, then

n-1 + N-2 + n-3 +....1 handshakes

take 4 people:

3+2+1= 6 handshakes.

10 people is

9+8+7+6+5+4+3+2+1= 45

14= 13+12+11+ 10 + number above

= 13+12+11+10+45= 91

you want 105, so try

15= 14+ 91

- math -
**Anonymous**, Monday, March 8, 2010 at 7:58pmSo the answer is 15? But still I don't get how you solve it

**Answer this Question**

**Related Questions**

math - How many people were at a party if There were 105 handshakes at a party ...

math - At a party, there were 105 handshakes. If each person shook hands exactly...

math - taylor was having a party.she invited 20 friends to her party, if each ...

math - At a party everyone shook hands with everyone exactly once there were a ...

Algebra - A scientist wants to research the potential spread of germs by contact...

maths - Please help. Thank you Fourteen people attend a meeting. If each person ...

Math - At a party, 55 handshakes took place as everyone shook hands with ...

Math - At a party, 55 handshakes took place as everyone shook hands with ...

maths - Dear Sir I need help for the below questions Please help thanks larry ...

math - If 8 people went to a party and each person shook hands at least one time...