bonanova Posted October 5, 2008 Report Share Posted October 5, 2008 (edited) I know it's unlucky, but fill in the 13th number: Edit: 13th only means there are 13 numbers and 12 are already there - not that it's the last number in a sequence. ..99..45..39..36..28..21 72..27..18..21..?...13..7 Edited October 5, 2008 by bonanova Clarify: missing number is not that last number in a sequence Quote Link to comment Share on other sites More sharing options...
0 grey cells Posted October 5, 2008 Report Share Posted October 5, 2008 is appearances are deceptive. At first glance, I thought I had the answer. But then 7 doesn't fit and does the 13th number mean the missing number is the last number in the sequence? Or is the answer simply 7? I guess not, but I had to put it down. Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted October 5, 2008 Author Report Share Posted October 5, 2008 Nope. I should have said fill in the missing number. It's not the last number in a sequence: take your cues from the arrangement given. Quote Link to comment Share on other sites More sharing options...
0 Yoruichi-san Posted October 5, 2008 Report Share Posted October 5, 2008 Should the last number be 8 instead of 7? I think the missing number is 15. Quote Link to comment Share on other sites More sharing options...
0 grey cells Posted October 5, 2008 Report Share Posted October 5, 2008 Should the last number be 8 instead of 7? I think the missing number is 15. too thought of the same answer but Bona said 7 does fit. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted October 5, 2008 Report Share Posted October 5, 2008 It appears to be having LCM of 3,5 Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted October 5, 2008 Author Report Share Posted October 5, 2008 Believe it ... the rightmost number is not 8. Can you spell red herring. Quote Link to comment Share on other sites More sharing options...
0 Prime Posted October 5, 2008 Report Share Posted October 5, 2008 too thought of the same answer but Bona said 7 does fit. Perhaps...Perhaps, it is 21 that doesn't fit then? Should it be 20? Quote Link to comment Share on other sites More sharing options...
0 grey cells Posted October 5, 2008 Report Share Posted October 5, 2008 Perhaps...Perhaps, it is 21 that doesn't fit then? Should it be 20? I think everything fits. It was Bona's red herring. The pattern's something else. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted October 5, 2008 Report Share Posted October 5, 2008 I think the missing number il 15 (21+15=36; 15+13=28) Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted October 5, 2008 Author Report Share Posted October 5, 2008 No one has it yet. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted October 5, 2008 Report Share Posted October 5, 2008 Along the top line, the differences are 7,8,3,6,54. If you treat those as digits, they come to 3,4,5,6,7,8. Along the bottom line, you get 6,_,_,3,9,45. You should get 3,4,5,6,7,8,9, but I can't find a number that would produce that. Maybe the pattern is coincidental? Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted October 6, 2008 Author Report Share Posted October 6, 2008 Along the top line, the differences are 7,8,3,6,54. If you treat those as digits, they come to 3,4,5,6,7,8. Along the bottom line, you get 6,_,_,3,9,45. You should get 3,4,5,6,7,8,9, but I can't find a number that would produce that. Maybe the pattern is coincidental?you may conclude that pattern is coincidental. It requires venturing outside that kind of box. Quote Link to comment Share on other sites More sharing options...
Question
bonanova
I know it's unlucky, but fill in the 13th number:
Edit: 13th only means there are 13 numbers and 12 are already there - not that it's the last number in a sequence.
..99..45..39..36..28..21
72..27..18..21..?...13..7
Edited by bonanovaClarify: missing number is not that last number in a sequence
Link to comment
Share on other sites
12 answers to this question
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.