i'm helping my daughter (3rd grade) with her homework and she had "complete the sequence"... she got the first 2 but couldn't get the 3rd one, and neither can I.... (it's the 'bonus' question, but still) 12, 15, 19, 24, 36, _______, ________, _______ please explain your answer
12, 15, 19, 24, 36, 49, 63, 78 12+3 15+4 19+5 24+12 36+13 49+14 63+15 that's how i saw it anyway, there are much wiser brains on here though... there is no way i would have figured that out in the 3rd grade.
http://www.research.att.com/~njas/sequences/ This website doesn't recognize this sequence, and it goes pretty in depth. Are you listing it exactly as the problem states, or with some of the answers your daughter filled in?
i don't see a sequence, either. If you take the 1st three differences (3 4 5) they do add up to the 4th difference 12, but there's nothing to say what the next number is.
could that 36 be intended to be a "30" instead, typo or handwritten mistake of 6 for 0? (some people's hand-written 6s look like 0s, etc.) then it'd be: 24+6 = 30 30+7 = 37 37+8 = 45 that's what i'd expect for 3rd grade...
exactly as the paper... i'm beginning to wonder if 36 was a typo and should have been 30. Then the pattern would be easy enough (3rd grade level).
For a third grade problem I would put my money that 36 was supposed to be 30. Then it would be an easily recognizable +3, +4, +5, +6 sequence, one that a third grader could solve. If not then I don't know what to tell you
is it one of those old-school handwritten sheets xeroxed from the 1970s? maybe the teacher retyped one? or your daughter copied it from the blackboard/overhead?
no its typed up, but i'm sure from the teacher's word processor, not professionally. i'm just glad no one else found a pattern.... i feel less stupid in a group setting
no clue, just first glance... i agree with this, the 30 would make sense. can you email the teacher and ask if it's a typo?
Did you tell your daughter that it was typo? Let her try it with a "30" instead so she can figure it out and not feel so bad about it.
my first thought was a typo for 30 as well. only thing that makes sense for a 3rd grader. even adding up the previous 3 differences like nuggien did, it would only make sense to start 12, 15, 18, 24, 36 instead of a 19 for the 18. then the differences would be 3, 3, 6, 12, etc., with the previous 3 always adding up to the next one (putting 0's before it starts) whereas with this you just have to let the first 3 go before you start adding them together to get the next one. either way, the typo is what makes sense.
This is a ridiculous long shot. It goes +3 +4 +5 then it goes +12. 12 is the product of the first to numbers. Then the pattern would repeat So after that it would go 36, 39, 43, 48, 60 It seems more likely that there was a typo.
