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Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.


Puzzle ID:#27719
Fun:*** (2.89)
Difficulty:** (1.61)
Submitted By:bigSWAFF_69_Aus******
Corrected By:FatHead




A Triple is a Series with 6 sets, each with 3 numbers apiece. The relationship between the first two numbers is the same throughout all of the sets, and the relationship between the last two numbers is also the same, however, it is different than the first relationship. Try and find the missing numbers:

2 5 10
3 10 20
4 17 34
5 __ __
_ 37 __
_ __ 100


2 5 10
3 10 20
4 17 34
5 26 52
6 37 74
7 50 100

Relationship for first two numbers: square it, add 1 (2 squared=4, 4+1=5)
Relationship for last two numbers: double it (5 doubled = 10)


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Dec 29, 2005

Very easy, but I like it. Cool teaser.
Jan 02, 2006

Good teaser swaffy!
Jan 02, 2006

good brain exercise for the tougher ones
Dec 23, 2007

Quite a simple one!
Dec 23, 2007

very easy
Dec 23, 2007

Easy for you guys. Not so easy for me. Obviously not one of my favorites. Sorry.
Dec 23, 2007

I suck at math. I'm sorry, I didn't get it. But at least you posted and for that I am greatful. Maybe I'll do better next time.

Dec 23, 2007

I totally got that one!!! Need more coffee...
Dec 23, 2007

This is what I'm talking about! The perfect teaser. Thank you very much! 10
Dec 23, 2007

THIS out of all of my other teasers got Teaser of the Day?

What has the world come to?
Dec 23, 2007

I Dunno. Coffee or Tea is needed!I got on one correct!

Thanks Anyway! Keep sending em
in! I might get smarter again after the Holidays! Ho! Ho! Ho!

Brain is worn out
Dec 23, 2007

I really, really enjoyed that one!
Dec 23, 2007

I usually give up on this kind of teaser pretty quickly, but figured this one out and really enjoyed it. Thanks!
(user deleted)
Dec 23, 2007

This is one of those odd problems (that occur frequently in math) where you can come up with the right answer the wrong way. I added the first two numbers of line one and the first number of line two to obtain the middle number of line two, then doubled that for the third number in line two. This is consistent throughout.
Dec 23, 2007

4+4+5 = 13 and not 17. So that wouldn't work. I see where it worked for the first two lines, but it quickly stops.

I liked this puzzle, my only complaint, you went 2 through 7. I might've liked to have seen you jump ahead. 11, 101, something higher.
Dec 23, 2007

Sorry, misread the directions for etcbeatty, that does work.
Dec 23, 2007

there's other correspondences with numbers too...I got the same answers but used a different way. If you notice, the first column of numbers is 2, 3, 4, so 5 & 6 make sense. The last column is double the middle column. The numbers in the middle column differ by the odd numbers....between 2 and 5 is a difference of 3, between 10 and 3 is a difference of 7, then a difference of 9, 11, etc.
Dec 23, 2007

Good one ... thank you!
I like logic puzzles and I like math puzzles ... this one combines the two.
Dec 23, 2007

Even though I solved it somewhat quickly, it was a most enjoyable 90 seconds! Thanks for submitting.
Dec 23, 2007

great teaser... couldnt figure it out though... maybe next time
Dec 23, 2007

Yeah I like these too, but also figured it out working up and down (first column just went 1, 2, 3, 4, 5, 6, 7; second column was first add 5, then 7,then 9, then 11, then 13 etc...; third column was add 10, then 14, then 18, then 22, then 24 etc....). Good one though!
Dec 24, 2007

I agree it would have been a bit more challenging had it not been just the numbers 2-7 like that. However I found other people's comments interesting about other patterns they found. Very good!
Dec 24, 2007

Fun and easy (don't think I don't like easy ones too!)
Dec 27, 2007

Not bad, but a little too easy because of the pattern in the first column, as etcbeatty implicitly pointed out.

Aw well. Like I say, not bad.
Nov 07, 2008

Nice, easy, and fun
Dec 23, 2010

Or, think it this way to complete the second column:
The number in the second column is:

Mumber of the first column plus the sum of the first and the second numbers of the previous line
Dec 23, 2010

I got the answers but did it the same way that robert_lewis200 teaser!
Dec 23, 2010

Really easy, not a challenge , but fun.
Dec 23, 2010

enjoyed it. Thank you.
Dec 23, 2010

i got it right but if you add the first 2 numbers, thats the difference between the first two numbers of the next set.. try it.
Dec 23, 2013

As has been pointed out, there's more than one way to skin this cat. My point of entry was noticing that the second number in each row, divided by the first number, equals the first number plus its reciprocal ((2/5 = 2 + (1/2)), and so on. Everything else then fell into place. But the recognition that the second number in each row equals that number squared, plus one, is conceptually neater.
Dec 23, 2013

Got it- Reminds me of a high school IQ test question.
Dec 23, 2016

I am with those who do not care for this one. I never even try these kind.
Dec 23, 2016

If possible to describe a teaser as "elegant" this is it; (albeit in a simplistic way). I'm reminded that life need not be complicated nor exceedingly difficult to be worth experiencing. Well done.

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