Can you name the next number in the sequences below?

created by hsver1887

Enter a number in the box below
Correctly named numbers will show up below
Click any empty Problem or Answer to answer for that location
Also try: Odd Number Out

You have 6 minutes to guess after you click the button below.

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Show Missed Answers

Problem	Answer	Pattern
16 14 17 13 18 12 19 ?		Subtract 2, add 3, subtract 4, etc.
8 11 15 19 24 29 35 ?		Add 3, add 4, add 4, add 5, add 5, etc.
1 4 9 16 25 36 ?		Perfect squares
1 3 6 8 12 14 19 ?
24 12 8 40 20 16 80 ?
22 27 28 14 19 20 10 ?		Add 5, then 1, then divide by 2, etc.
2 4 8 16 20 40 44 ?		Multiply by 2, add 4, etc
3 5 15 10 12 36 31 ?		Add 2, multiply by 3, add two, etc.
16 8 24 20 10 30 26 ?
3 6 18 21 7 10 30 ?
1 3 2 6 5 15 14 ?		Multiply by 3, subtract 1, etc.
23 21 18 22 17 11 18 ?		Subtract 2, subtract 3, add 4, etc.
2 3 5 7 11 13 17 19 ?		Prime numbers
1 4 8 13 26 33 66 ?		Add odd number, multiply by 2, etc.
21 8 24 12 36 25 75 ?

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There are 106 comments for this game.
(Warning: comments may contain spoilers)

Next Number Quiz

Rating:	Report a mistake
Created by: hsver1887 -
Contributed: February 2nd, 2010
Published: February 10th, 2010
Category: Science
Plays: 114,920

Tags: Numbers Quizzes, Math Quizzes, problem, pattern, sequence

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Archived comments: show them

	mllawing:	Feb 10th, 2010 at 17:45 GMT	4 points
	Some of these I couldn't figure out why, I just knew. It's weird.

	Nexxia:	Feb 10th, 2010 at 17:47 GMT	66 points
	4 8 15 16 23 ?

	gurl94:	Feb 10th, 2010 at 17:49 GMT	1 point
	@nexxia 42. love it.

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	mcbain:	Feb 10th, 2010 at 17:53 GMT	3 points
	Any chance we could get an explanation for these? I'm curious about the ones I missed.

	stmiller:	Feb 10th, 2010 at 17:53 GMT	0 points
	Cool quiz. @mllawing, I am NOT one of those people who "just know" this kind of thing- hard when i haven't taken math since high school. My percentile was terrible, but I had fun nonetheless.

	Platypus222:	Feb 10th, 2010 at 17:53 GMT	15 points
	Good quiz, but I think it would have been a good idea to include the pattern in the third column, only appearing when you get the answer correct or you run out of time (or give up).

	wheatonbrando:	Feb 10th, 2010 at 18:08 GMT	4 points
	Good idea, but many of the patterns are too similar. I think you could've mixed it up a little bit with some different types of patterns. Or maybe make it so you have to get it right on your first try.

	TerryM:	Feb 10th, 2010 at 18:10 GMT	3 points
	Honestly, I thought this was fairly easy. You can solve all of these by figuring out the pattern of operations. If one of the patterns was "add the previous two numbers, subtract the difference between the previous two numbers" or something fun like that, we might have a ballgame. Still, a lot of fun already.

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	qb13:	Feb 10th, 2010 at 18:16 GMT	2 points
	nice. might not be a bad idea to put the patterns in for the ones you miss...got them all

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	bsd987:	Feb 10th, 2010 at 18:18 GMT	3 points
	77 could be correct for penultimate since 3,5 and 7 are all prime numbers, so 11 could be the next answer.

	NobleDB:	Feb 10th, 2010 at 18:23 GMT	0 points
	I love Sporcle!

	Joe_B:	Feb 10th, 2010 at 18:25 GMT	-1 points
	I liked this one a lot. Can someone give me the pattern for the last one, please ? I can provide the others.

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	biziclop:	Feb 10th, 2010 at 18:30 GMT	0 points
	A lunk to this site could probably be useful: http://www.research.att.com/~njas/sequences/index.html

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	Joe_B:	Feb 10th, 2010 at 18:34 GMT	-2 points
	@greebles: thanks ! I NEVER would have gotten that one. Now I can sleep tonight.

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	SporcleAdmin:	Feb 10th, 2010 at 18:50 GMT	6 points
	OK, added a 3rd column with the pattern....ooof now my head hurts, I am gonna go lie down.

	Etheridge2:	Feb 10th, 2010 at 18:56 GMT	-2 points
	Fun and I finished just in time

	rockgolf:	Feb 10th, 2010 at 18:56 GMT	0 points
	The pattern would work better as signed operations. E.g.: -2, +3, -4, +5... +3, +4, +4, +5, +5... And your head must really hurt from all the times you use "multiple" instead of "multiply". ;) Note: you have the wrong pattern on 1 3 2 6 5 15 14 ? It should be: x3, -1, x3, -1, x3, -1...

	eurythmech:	Feb 10th, 2010 at 18:58 GMT	11 points
	I'm shocked this made it official. 75% of them followed the same principle.

	DCosby56:	Feb 10th, 2010 at 19:00 GMT	-2 points
	I love finding patterns. 14/15 cuz i ran out of time. Great quiz!

	peanut4:	Feb 10th, 2010 at 19:02 GMT	4 points
	The patterns aren't very good explanations or at least aren't full explanations. Also the penultimate one is incorrect. If it's adding prime numbers, why is the answer 66 + 9 = 75. It's either adding odd numbers or the answer should be 77?

	SporcleAdmin:	Feb 10th, 2010 at 19:02 GMT	7 points
	Well, rockgolf woke me from a perfect good nap to fix things, should be better now.

	cappy:	Feb 10th, 2010 at 19:03 GMT	3 points
	I really like the idea. I think it'd be a good idea to lower the time limit just a bit. When thirty percent of the people who take the test are getting all 15 right, then yeah, probably cut the time limit by a minute to a minute and a half. My personal idea of "good results" is when you see a bell curve there.

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