dan19_83 Posted February 4, 2005 Share Posted February 4, 2005 not sure if this one is easy or not but i'll let ye decide. This sequence gives a five letter word: ijklmn maybe it is too easy, i hope it's not! Link to comment Share on other sites More sharing options...
Martin Posted February 6, 2005 Share Posted February 6, 2005 not sure if this one is easy or not but i'll let ye decide. This sequence gives a five letter word: ijklmn maybe it is too easy' date=' i hope it's not![/quote'] I think it must not be easy because it has stood for 3 days with no one trying it. here is a try: the 5-letter word LEMON because if you say the sequence of letters fast it sounds like eye-jay-kay-al-em-en eye-jay-kay-a-lem-un eye-jay-kay-a-LEMON Link to comment Share on other sites More sharing options...
dan19_83 Posted February 7, 2005 Author Share Posted February 7, 2005 good try but wrong! the answer actually is actually a bit of a play on some simple chemistry. Link to comment Share on other sites More sharing options...
Martin Posted February 8, 2005 Share Posted February 8, 2005 good try but wrong! the answer actually is actually a bit of a play on some simple chemistry. oh you mean water! the letters Haitch to Oh Link to comment Share on other sites More sharing options...
Martin Posted February 8, 2005 Share Posted February 8, 2005 duh I should have seen that good puzzle, please post another! Link to comment Share on other sites More sharing options...
Martin Posted February 8, 2005 Share Posted February 8, 2005 meanwhile, here's one for you: what's the next in the sequence? 3, 3, 5, 4, .... Link to comment Share on other sites More sharing options...
dan19_83 Posted February 8, 2005 Author Share Posted February 8, 2005 here's a guess. the sequence starts 0, 3, 3, 5, 4, so its +3, -0, +2, -1 so the next few sequences would be +1, -2, +0, -3 and so on. is the next number 5? Link to comment Share on other sites More sharing options...
Martin Posted February 8, 2005 Share Posted February 8, 2005 meanwhile' date=' here's one for you: what's the next in the sequence? 3, 3, 5, 4, ....[/quote'] no the next number is not 5 I will give a couple of more terms in the sequence. (you might say this is a word problem like yours) 3, 3, 5, 4, 4, 3,... what comes next? Link to comment Share on other sites More sharing options...
dan19_83 Posted February 8, 2005 Author Share Posted February 8, 2005 this was a good one, i must say. it came to me when i registered that both one and two have three letters in them!! 3, 3, 5, 4, 4, 3, 5, 5, 4, 3 1, 2, 3, 4, 5, 6, 7, 8, 9, 10! Link to comment Share on other sites More sharing options...
Martin Posted February 9, 2005 Share Posted February 9, 2005 suppose that 9 x 13 = 2 7 x 11 = 6 17 x 23 = 9 then what is 27 x 15 = ? if you saw this before, please just say "I saw it before" and dont spoil it for someone else (even if it has already been asked here on SFN) but if you didnt already, then I think it might be pretty hard! good luck! Link to comment Share on other sites More sharing options...
dan19_83 Posted February 9, 2005 Author Share Posted February 9, 2005 one of my friends figured it out. i won't say the answer though, i'll leave it for others to figure out. good one though. Link to comment Share on other sites More sharing options...
Primarygun Posted February 10, 2005 Share Posted February 10, 2005 is x a new symbol? I think I need a clarification. Link to comment Share on other sites More sharing options...
Martin Posted February 10, 2005 Share Posted February 10, 2005 9 x 13 = 2 7 x 11 = 6 17 x 23 = 9 then what is 27 x 15 = ? no x is not a new symbol, it just means "times" DAN19_83 or his friend posted the answer earlier and then erased it. I thought it was pretty hard, but his friend didnt. here is a hint: rewrite it this way nine x thirteen = 2 seven x eleven = 6 ... Link to comment Share on other sites More sharing options...
Martin Posted February 16, 2005 Share Posted February 16, 2005 Looks like that "arithmetic" problem remains unsolved (except by Dan's friend who erased his answer) here is another Which one does not belong? Xenon Carbon Boron Neon Silicon Link to comment Share on other sites More sharing options...
Tommio Posted February 16, 2005 Share Posted February 16, 2005 How about silicon due to number of vowels and 27 x 15 = 6? Link to comment Share on other sites More sharing options...
Martin Posted February 16, 2005 Share Posted February 16, 2005 That's not the answer I had in mind, so I will give a clue. Arsenic also belongs So here is the problem again: Which one does not belong? Arsenic Silicon Xenon Carbon Boron Neon (you know that the first two definitely belong, so you have to choose the odd one out from among the other four) Link to comment Share on other sites More sharing options...
YT2095 Posted February 16, 2005 Share Posted February 16, 2005 Ne, the others can form Ionic bonds Link to comment Share on other sites More sharing options...
Martin Posted February 16, 2005 Share Posted February 16, 2005 Ne, the others can form Ionic bonds Neon is not the answer I had in mind, so I will give a clue. This is a word puzzle! (you know need to know about types of chemical bonds to answer) But let's declare YT to have won round one and say that neon didnt belong, and remove it. We still have five element names left. So here is the problem again: Which one does not belong? Arsenic Silicon Xenon Carbon Boron (you know that the first two definitely belong, so you have to choose the odd one out from among the other three) Link to comment Share on other sites More sharing options...
Newtonian Posted February 18, 2005 Share Posted February 18, 2005 Carbon. No ive got it,its boron because it isnt found free in nature,but occurs as orthoboric acid. All the others are,am i right,am i Link to comment Share on other sites More sharing options...
Martin Posted February 18, 2005 Share Posted February 18, 2005 It is a word puzzle, not a chem problem. all you need, to get the answer, is the periodic table. you dont need to know any chem. would you like me to post the answer? Link to comment Share on other sites More sharing options...
jdurg Posted February 18, 2005 Share Posted February 18, 2005 Carbon because it has an even number of letters in its name while Arsenic, Silicon, Xenon, and Boron all have odd numbers of letters. (As=7, Si=7, Xe=5, and B=5. C=6). Neon was also removed because it has 4 letters in its name. Link to comment Share on other sites More sharing options...
Newtonian Posted February 18, 2005 Share Posted February 18, 2005 Yeah i was going to say that,i was honest because i put that first.However i changed my mind because it was too easy.So i guess i was correct all along ok.I knew i was good at this,i just knew:-) Link to comment Share on other sites More sharing options...
Martin Posted February 18, 2005 Share Posted February 18, 2005 That's not the answer I had in mind' date=' so I will give a clue.Arsenic also belongs So here is the problem again: Which one does not belong? Arsenic Silicon Xenon Carbon Boron Neon (you know that the first two definitely belong, so you have to choose the odd one out from among the other four)[/quote'] Sorry guys, Neon belongs. I pulled it off the list when YT guessed the odd one was Neon (his reason had to do with ionic bonding) to indicate that Neon was NOT the odd one. You can be sure that Arsenic, Neon, and Silicon belong. every name on the list (except the odd one) has something in common. Like Newtoninan says it would be too easy if it were just the number of letters. Link to comment Share on other sites More sharing options...
jdurg Posted February 18, 2005 Share Posted February 18, 2005 Okay, now I'll go with Boron. It's atomic number is the only prime number in the bunch. (Boron=5, Carbon=6, Neon=10, Silicon=14, Arsenic=33, Xenon=54). Link to comment Share on other sites More sharing options...
Martin Posted February 18, 2005 Share Posted February 18, 2005 Congratulations JDURG! You have done better than just come up with what I thought was the right answer. You have convinced me that your explanation is better, for why it is the right answer. BORON IS RIGHT!!! the reason Jdurg gives is the elegant one that it is the only one with a prime number of protons in its nucleus-----casually combining number theory with atomic physics. the original idea was not the prime number thing but that THE NAME OF THE ELEMENT SHOULD ITSELF BE A "COMPOUND" of the chemical element symbols themselves CaRbON calcium, rubidium, oxygen, nitrogen NeON neon, oxygen, nitrogen ArSeNiC argon, selenium, nickel, carbon But BORON no way can you spell that with element symbols because there is no R or Ro in the periodic table this problem, I dont know where it originated or who made it up. I just encountered it a year or so ago. Link to comment Share on other sites More sharing options...
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