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 November 23rd, 2015, 07:23 AM #1 Newbie   Joined: Nov 2015 From: vietnam Posts: 9 Thanks: 0 difficult question 1) 1/1, 2/5, 4/9, 8/13, 16/17, ? ------> 2) ?, 5, 5, 0, 1, 0, 0, 2, 0, 0, 4, 0, 0 ------> 3) 21/311 , 30/3000 , 19/109 , 35/? ------> 4) 15 124 115 14 121 119, 51 161 191 91 121 151 ? ------> 5) 78, 1516, 1314, 910, 1011, ? ------> 6) 13, 116, 121, 2411, 148, ? ------> 7) 37, 8, 98, 1, 311, 821, 541, ? ------> 8) 51, 74, 34, 51, 16, 56, 53, 26, 51, 18, ? ------> 9) 11, 23, 327, ?, 559049 ------> 10) 16, 1, 272, 11, 0, 221, 51, 6, ? ------> 11) 513, 282, 315, 523, 181, ? ------> 12) 1 2 = 221, 222 ? = 11222222 ------> 13) 625/420 , 15/20 , 34/570 , 12/50 , 25/? ------> 14) 100, 200, 411, ?, 1122 ------> 15) 21, 42, 138, 1416, 32115, 64116, 1117128, ? ------> 16) 1000/1130 , 552/2512 , 6555/1635 , 227/? ------> 17) 75, 14, 25, 4 : 46, 66, 1 : 45, ? ------> 18) 337(1) , 9999927(-18) , 555531(?) ------> 19) 7, ?, 212, 8354, 24956, 637077 ------> 20) 33, 49, 88, 74, 22, 2, 14, 32, ?, 4.5 Last edited by skipjack; November 23rd, 2015 at 08:38 AM.
 November 23rd, 2015, 07:26 AM #2 Newbie   Joined: Nov 2015 From: vietnam Posts: 9 Thanks: 0 help me please!!
 November 23rd, 2015, 08:16 AM #3 Math Team     Joined: May 2013 From: The Astral plane Posts: 2,258 Thanks: 929 Math Focus: Wibbly wobbly timey-wimey stuff. Give someone a chance to respond, will you? Bumping is rude. You will be visited by ravaging tonight. Quite a list. I hope you don't have any plans for us to do all of them for you. General hints: Look for prime numbers, squares of numbers, triangular numbers, arithmetic series, and geometric series. This won't solve them all, but they are good to check for. Example: 1) The numerators are powers of 2. What about the denominators? What do 12) , 17) and 18 ) mean? I can't make sense out of them. -Dan Thanks from huy Last edited by topsquark; November 23rd, 2015 at 08:19 AM.
 November 23rd, 2015, 10:14 AM #4 Global Moderator   Joined: Dec 2006 Posts: 20,942 Thanks: 2210 Some lateral thinking helps, but I've done only a few. 1) See above hints. 3) Possibly 8555. 5) The next value is 34 (then the whole sequence repeats). 12) 1 14) Possibly 611. 15) 1118256 16) 2217 18) 11 Thanks from huy
 November 23rd, 2015, 09:11 PM #5 Newbie   Joined: Nov 2015 From: vietnam Posts: 9 Thanks: 0 I am very thank you. You really is good to find, but please, please help me finish them all. Once again, thank you very much. Please tell me about our results. Thanks. Last edited by skipjack; November 23rd, 2015 at 10:12 PM.
 November 23rd, 2015, 11:34 PM #6 Global Moderator   Joined: Dec 2006 Posts: 20,942 Thanks: 2210 My answers for questions 12 and 14 were wrong, albeit nearly right. I can tell you that questions 6 and 9 are quite easy. I know a few other answers, but I think we should stop doing these for you, as it would spoil things for other people. What the questions are doing is hiding fairly simple principles in various ways that are sometimes quite tricky to spot, so try asking yourself what hiding method might have been used, bearing in mind any patterns that you notice. Thanks from huy
November 24th, 2015, 03:58 AM   #7
Newbie

Joined: Nov 2015
From: vietnam

Posts: 9
Thanks: 0

Quote:
 Originally Posted by skipjack My answers for questions 12 and 14 were wrong, albeit nearly right. I can tell you that questions 6 and 9 are quite easy. I know a few other answers, but I think we should stop doing these for you, as it would spoil things for other people. What the questions are doing is hiding fairly simple principles in various ways that are sometimes quite tricky to spot, so try asking yourself what hiding method might have been used, bearing in mind any patterns that you notice.
I thank you very much and you can spend some of his spare time helping tui answer these questions, I really needed. and I also urge you to show me how to find the end or a rule or something that helps me understand more and I can do the same through all your guidance

 November 24th, 2015, 04:16 AM #8 Newbie   Joined: Nov 2015 From: vietnam Posts: 9 Thanks: 0 please help me find out all results thanks
 November 24th, 2015, 04:19 AM #9 Math Team   Joined: Dec 2013 From: Colombia Posts: 7,675 Thanks: 2655 Math Focus: Mainly analysis and algebra You need to post some of your work. This site is not here to provide answers, but to provide assistance. Thanks from topsquark, huy and Joppy
November 24th, 2015, 05:51 AM   #10
Newbie

Joined: Nov 2015
From: vietnam

Posts: 9
Thanks: 0

Quote:
 Originally Posted by v8archie You need to post some of your work. This site is not here to provide answers, but to provide assistance.
Yes, but I cannot think how to do them and I need help from you guys. Thanks.

Last edited by skipjack; November 24th, 2015 at 11:21 AM.

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