From the introduction, the emails to Carly arrived between 9:00 and 9:55
last night. By clue 1, the shortest interval between emails was 8 mins.
By clue 3, then, the email from the friend who has msn.com as a mail address,
which arrived at 9:50, must be the last one, since the earliest one after
that would be at 9:58, too late given the intro. In clue 7, 4 different
emails are given. Since the friend who emailed about math homework isn't
the one who uses msn.com (clue 3), none of the four in clue 7 can be the girl
who uses msn.com. By clue 7, then, two arrangements are possible:
the friend whose SID is sweetsound sent the 1st email and Jenny sent
the 3rd, or Jenny sent the 1st and sweetsound sent the 3rd. Trying the
first arrangement, sweetsound would have sent the 1st email, the girl who
emailed about the homework would have sent the 2nd, Jenny would have
emailed Carly 3rd, and the girl who uses yahoo.com as a mail address would
have sent the 4th. By clue 8, lilone's email to Carly was followed 16 mins.
later by Emily's. If lilone were Jenny's SID and Emily had sent the 4th
email 16 mins. later, by clue 7, the time between sweetsound's email and
that of the friend asking about homework would be 32 mins. Adding these
two differences to the minimum of 8 mins. (1) and 9 mins. (6), we get 65 mins.
impossible given the last email was at 9:50. If lilone were @yahoo.com and
Emily @msn.com, then lilone's email would have come at 9:34. One interval
between emails is 8 mins. (1) and another 9 (6). Therefore, the three
remaining intervals before 9:34 would be 8, 9, and double either 8 or 9, given clue 7: 8, 9, 16
mins. or 8, 9, 18 mins. Since the second adds to 35 and would take us
back to 8:59 from 9:34, we need try only the first: Jenny's email would
have been 8 mins. before lilone's at 9:26, the one from the friend asking
about homework would have been 9 mins. before Jenny's, at 9:17, and
sweetsound's would have arrived at 9:01. By clue 6, Jenny would have
emailed about the upcoming dance. By clue 4, the time between Alicia's
email and that of the friend telling Carly to watch the TV show at 10
was twice that of the time between the email of the friend who uses
comcast.com and the girl talking about the upcoming TV show. Trying all the
possibilities with Alicia's email at 9:01, we have these numbers for the
(a) comcast.com email, (b) the TV show email, (c) the interval from Alicia's
email to the TV show email, and (d) the interval from the comcast.com email
to the TV show email: 9:17, 9:34, 33 mins., 17 mins.; 9:17, 9:50, 49 mins.,
33 mins; 9:26, 9:34, 33 mins., 8 mins.; 9:26, 9:50, 49 mins, 24 mins. None
of these numbers satisfies clue 4. Trying all the possibilities with Alicia's
email at 9:17, we have these numbers for the (a) comcast.com email, (b) the
TV show email, (c) the interval from Alicia's email to the TV show email,
and (d) the interval from the comcast.com email to the TV show email:
9:26, 9:34, 17 mins., 8 mins.; 9:26, 9:50, 33 mins, 24 mins. Neither of these
numbers satisfies clue 4. So, since clue 4 cannot work, arrangement 1 fails
and we have arrangement 2 of clue 7: Jenny sent the 1st email, the girl who
uses yahoo.com for her mail sent the 2nd, sweetsound emailed 3rd, and the
friend with the homework question emailed 4th. By clue 8, the interval
between lilone's and Emily's emails was 16 mins. If Jenny were lilone and
Emily had yahoo.com as a mail address, by clue 7, the time between sweetsound's
email and the one about homework would have been 32 mins. However, summing
with the minimum of 8 mins. (1) and 9 mins. (6), we get 65 mins. from 1st to
5th email, impossible since the 1st would be at 8:45. If lilone used yahoo.com
and Emily's SID were sweetsound, their emails would have been 16 mins. apart
(8). We have other intervals between emails of 8 (1) and 9 (6) mins. in
length. Therefore, the three intervals must be 8, 9, and double either 8 or 9,
given clue 7: 8, 9, 16 mins. or 8, 9, 18 mins. Since the second adds to 35 and
we have only 34 mins available (9:50  16 mins between lilone and Emily,
we need try only the first: the interval between the 1st and 2nd email
would be 8 mins. and the interval between the 3rd and 4th intervals would
be 16 mins., with the time between the 4th and 5th then the 9 mins. with
the girl inquiring about the upcoming dance having msn.com as a mailing
addressno (6). Therefore, lilone sent the 4th email and Emily the
5th, with lilone's at 9:34 (8). By clue 4, Emily had to email about the
TV show. If the friend who emailed about the dance in clue 6 were the one
who had yahoo.com as an address and the interval between the 1st and 2nd
emails was 9 mins., then by clue 7, the interval between the 3rd and 4th
would be 18 mins. Summing, however, we get 9+18, a total of 27 and
leaving only 7 mins for the other interval, contradicting clue 1. So,
the dance email was the 3rd one, following the 2nd by 9 mins. By clues 1
and 7, then, the interval between the 1st (Jenny's) and 2nd emails was 8
mins. and between the 3rd and 4th 16 mins.; the 3rd email came at 9:18,
the 2nd at 9:09, and the 1st at 9:01. By clue 4, the time between Alicia's
email and that of the friend telling Carly to watch the TV show at 10
was twice that of the time between the email of the friend who uses
comcast.com and the girl talking about the upcoming TV show. If Alicia
had sent the 2nd email at 9:09, her interval to the TV show one would
have been 41 mins; neither the comcast.com email at 9:18 (32 min. interval)
nor 9:34 (16 min. interval) satisfies clue 4. Alicia sent the 3rd email
and the girl with comcast.com as an address sent the 4th. By clue 5, Marci
sent the 2nd email, about the new music video, and Alicia uses aol.com.
By elimination, Jenny's email, from juno.com, was gossip,, and Tara sent
the 4th email. By clue 9, Marci's SID is volleyballr. Jenny's SID is
cheer1 and Emily's justinfan (2). In sum, the five emails arrived as
follows:
 9:01  Jenny, cheer1@juno.com, gossip
 9:09  Marci, volleyballr@yahoo.com, video
 9:18  Alicia, sweetsound@aol.com, dance
 9:34  Tara, lilone@comcast.com, homework
 9:50  Emily, justinfan@msn.com, TV show


