Can you pick the correct numbers that fit the given number sequences without making any mistakes?

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Fibonacci Numbers	Odd Number Out	Fun With 1234

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(Warning: comments may contain spoilers)

Number Sequence Nightmare Quiz

by citkeane

Created Aug 21, 2012 in Science
Featured Oct 10, 2012
Game Plays 111,235

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Archived comments: show them

	milkmeister:	Oct 10th, 2012 at 04:15 GMT		25 points
	Great idea for a quiz. I think a little bit too much time though. Definitely room for a sequel!

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	eab21:	Oct 10th, 2012 at 04:28 GMT		59 points
	Is it weird if I was most impressed by the moving arrow?

	milkmeister:	Oct 10th, 2012 at 04:31 GMT		35 points
	Interesting description by dje of a sequence of square numbers of "add the next odd number".

	Zak6009:	Oct 10th, 2012 at 04:53 GMT		41 points
	This is cool... except the whole time I was kind of expecting all the numbers to be used, I wasn't paying attention to the total counter and was caught totally off guard when it said "You got 30 answers correct"... wait, that's it?

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	tigerschick:	Oct 10th, 2012 at 06:20 GMT		12 points
	My problem was that I forgot that the sequences were finite and kept clicking a couple of times - yes I know that 50 isn't a prime number, I just didn't notice that the sequence had changed ... Oops!! It seems, looking at the stats, that if you know your primes then you're quite likely to get through to the end. Fun quiz :o)

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	jodyjm13:	Oct 10th, 2012 at 08:28 GMT		7 points
	Fun quiz; that last sequence took me a minute to figure out. @ostroffj: Smartass or not, I love seeing odd math stuff like that; thanks!

	LSMFT:	Oct 10th, 2012 at 09:39 GMT		9 points
	@dje. I see you are getting voted down, but I want to thank you for explaining each part because I am not great with numbers and your explanation helped me. I feel as if I have a greater understanding of number patterns thanks to you. Fun quiz citkeane

	Ferro:	Oct 10th, 2012 at 09:53 GMT		2 points
	Awesome quiz. The timer could be decreased by a minute to make it more exciting.

	austin5string:	Oct 10th, 2012 at 11:49 GMT		5 points
	@Zak6009 - I just had the exact same experience. I was like "What?? I know I didn't just click a wrong answer!? Oh wait, I'm done."

	CeeDeeTee:	Oct 10th, 2012 at 12:38 GMT		1 point
	Great quiz!

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	gregoire:	Oct 10th, 2012 at 14:11 GMT		2 points
	Fun quiz, seems the primes were what really tripped people up. Would love to see some more with some more difficult patterns too.

	xolkan:	Oct 10th, 2012 at 14:26 GMT		0 points
	The Fibonacci Sequence beat me.

	cornell4eva:	Oct 10th, 2012 at 14:44 GMT		12 points
	You don't need to know the Fibonacci Sequence by heart to spot the pattern.

	buppyspek:	Oct 10th, 2012 at 15:06 GMT		14 points
	@gerdramonemuller: I think they started that sequence at 5 so that answers weren't repeated from another sequence.

	UneasyRider:	Oct 10th, 2012 at 16:11 GMT		1 point
	@milkmeister - that is exactly how I did it as well: added the next odd number. Didn't even notice they were squares.

	dje:	Oct 10th, 2012 at 17:00 GMT		8 points
	@LSMFT- hanks. that was my goal. i was not expecting so many down votes, such harsh critics on here! I even started the comment with a warning! sheesh! @milkmeister- oops! didnt even notice that until you pointed it out. well, whatever, both work! haha

	JulieNMM:	Oct 10th, 2012 at 17:19 GMT		1 point
	I felt like I was taking a Mensa test.

	david6k:	Oct 10th, 2012 at 18:53 GMT		12 points
	As several have noticed, you can think of the sequence of squares as adding the next largest odd number: 0,1,4,9,16 is both 0^2, 1^2, 2^2, 3^2, 4^2 and 0, 0+1, 0+1+3, 0+1+3+5, 0+1+3+5+7. Why is this true? Well, we're talking about the difference between (x+1)^2 and x^2. That simplifies to (x+1)^2 - x^2 = x^2 + 2x + 1 - x^2 = 2x + 1. So to get from one square to the next, you multiply the square root by two and add one, and add the result to the square you started with. In y-intercept form, you have the equation y = 2x + 1, with 2 being the slope of the line -- every time you increase x by one, y (the number you'll have to add) increases by two. And since y must be odd for any integer value of x (because 2x must be even, so 2x+1 must be odd), and y increases by 2 each time, you go up the sequence of odd numbers.

	djfoams:	Oct 10th, 2012 at 19:24 GMT		-3 points
	My quiz ended after the 5's sequence?! No wrong answer, just ended.

	Jeffhabfan:	Oct 10th, 2012 at 21:18 GMT		8 points
	What kind of jerks are downvoting dje for being helpful to people who are having trouble? Isn't the point of these quizzes to learn?

	HowLongs:	Oct 10th, 2012 at 21:28 GMT		1 point
	Being a Tool fan made this quiz somewhat easier.

	Guinevere:	Oct 10th, 2012 at 23:54 GMT		-2 points
	Fun quiz, but probably too much time since I'm not much good at math and numbers and I got them all with over a minute left.

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	crdimitri:	Oct 11th, 2012 at 23:16 GMT		1 point
	Nice quiz. Thanks!

	Tenebrae:	Jan 7th, 2013 at 19:08 GMT		1 point
	My favourite mathematical quiz so far, got through it all in 2 minutes and 9 seconds. I personally feel that it could have had more sequences though, I agree with Zak6009 - I was literally looking at it when it stopped allowing me to click options, and looked at the time left to find some there. A sequel will be very much enjoyed by me. :)

	Aukyboy:	Jan 20th, 2013 at 21:04 GMT		0 points
	Too easy. I stopped halfway.

	kamikazepig:	May 1st, 2013 at 04:33 GMT		1 point
	It'd be fun if the time limit were one minute.