Brain Teasers
0.5, 2, 4.5, 8, 12.5, ...
Series
Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.Series
0.5, 2, 4.5, 8, 12.5, ...
What comes next?
What comes next?
Answer
18They are all consecutive square numbers - divided by 2
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Comments
Good teaser even though I don't like math/series and, of course, I didn't solve it! I've had to take a crash course in math just to understand these teasers!
to be honest, I didn't think this would get accepted. But it has Yippee
Or, it can be solved by starting at 0.5 then adding 1.5, 2.5, 3.5, 4.5......
Cool cool.
Cool cool.
i really liked it, even though it is really easy...you should try finding some trickier ones though, you'll have more accepted if you find harder teasers
If you make them too hard and nobody likes them. I solved it after some thought. I noticed a patern also. The difference between the first number and the second followed the pattern 1.5, 2.5, 3.5, 4.5. I just added 5.5 to 12.5 and got 18.
Good one.
Good job. I did it the same way as eeyore though.
Another Good One!Great Job!
yes. they are constant increments, 1.5,2'',3'',4'',5''.
Cause doncha know that square numbers increase in the same way.
cause the diff between 2 squared and 3 squared is just 2+3.
diff between 3 and 4 is 3+4.
(3+4)-(2+3)=2/2 = 1
Cause doncha know that square numbers increase in the same way.
cause the diff between 2 squared and 3 squared is just 2+3.
diff between 3 and 4 is 3+4.
(3+4)-(2+3)=2/2 = 1
good teaser!though,i stink at math
I also found it out in the other way. That's like the mind article that braingle had, find more than one way to do something, and it will help your mind.
Great teaser though. I haven't see any series ones with decimals untill this one.
Great teaser though. I haven't see any series ones with decimals untill this one.
the nth term of this sequence is given by:
(n^2)/2
so the 6^th term can be calculated as: (6^2)/2 = 36/2 = 18
(n^2)/2
so the 6^th term can be calculated as: (6^2)/2 = 36/2 = 18
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