other person once only ?
a)50
b)90
c)20
d)45
2006-07-29 21:47:47 · 8 answers · asked by busycatman 1 in Education & Reference ➔ Homework Help
45
2006-07-31 00:07:15 · answer #1 · answered by wollemi_pine_writer 6 · 0⤊ 0⤋
45
2006-07-30 04:50:11 · answer #2 · answered by kuranga999 1 · 0⤊ 0⤋
The first guy shakes 9 hands, the second guy shakes 8 hands (his hand shake with the first has already been counted), the third guy shakes 7 and so on till the 9th guy who shakes hand with the 10th one. The 10th guy doesn't have anybody else to shake hands with.
So the answer is 9+8+7+6+5+4+3+2+1= 45
Two hands equals one shake. So answer is not 90...
2006-07-30 04:56:49 · answer #3 · answered by Wrobinhood 3 · 0⤊ 0⤋
If every other person means every person other than him/herself then the answer is 90.
If you mean every other person as in shake, no shake, shake, no shake then I believe it is 45.
But then again I'm not a big math buff. I'm an English nerd. ^.~
EDIT--- I just missed the only once part. Haha! Helps if I read the whole question completely twice to make sure my ADD self doesn't get distracted and miss things like that.
2006-07-30 04:55:17 · answer #4 · answered by avalon_jdh 2 · 0⤊ 0⤋
45. the formula is n*(n-1)/2, where n is in this case 10 (it's the formula for the number of diagonals in a polygon)
2006-07-30 05:09:33 · answer #5 · answered by raul 3 · 0⤊ 0⤋
d) 45
2006-07-30 04:51:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋
90 handshakes
2006-07-30 04:59:13 · answer #7 · answered by jonzmom1 3 · 0⤊ 0⤋
90 handshakes,
2006-07-30 04:53:31 · answer #8 · answered by Anonymous · 0⤊ 0⤋