Can you name the triangular numbers in order?

To be added	Sum
1
1+2
1+2+3
1+2+3+4
1+2+3+4+5
1+2+3+4+5+6
1+2+3+...+7
1+2+3+...+8
1+2+3+...+9
1+2+3+...+10
1+2+3+...+11
1+2+3+...+12
1+2+3+...+13
1+2+3+...+14
1+2+3+...+15
1+2+3+...+16
1+2+3+...+17
1+2+3+...+18
1+2+3+...+19
1+2+3+...+20
1+2+3+...+21
1+2+3+...+22
1+2+3+...+23
1+2+3+...+24
1+2+3+...+25

To be added	Sum
1+2+3+...+26
1+2+3+...+27
1+2+3+...+28
1+2+3+...+29
1+2+3+...+30
1+2+3+...+31
1+2+3+...+32
1+2+3+...+33
1+2+3+...+34
1+2+3+...+35
1+2+3+...+36
1+2+3+...+37
1+2+3+...+38
1+2+3+...+39
1+2+3+...+40
1+2+3+...+41
1+2+3+...+42
1+2+3+...+43
1+2+3+...+44
1+2+3+...+45
1+2+3+...+46
1+2+3+...+47
1+2+3+...+48
1+2+3+...+49
1+2+3+...+50

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Triangular Numbers Quiz

Rating:	Report a mistake
Created by: benzylene -
Contributed: October 18th, 2009
Published: November 24th, 2009
Category: Science
Plays: 63,590

Tags: Numbers Quizzes, Math Quizzes, sum, triangular, arithmetic, order, added

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	SuperEntreri:	Nov 24th, 2009 at 17:24 GMT	31 points
	That formula is so wrong, I'm not even gonna touch it.

	markbecker8:	Nov 24th, 2009 at 17:35 GMT	9 points
	nowhere close to accurate... its crazy the way the number patterns work out

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	Woopee:	Nov 24th, 2009 at 17:52 GMT	19 points
	[(x^2)/2]+(x*.5)

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	sammyb:	Nov 24th, 2009 at 18:06 GMT	15 points
	time seems ok to me

	raisingfear101:	Nov 24th, 2009 at 18:08 GMT	50 points
	another generic comment about the time

	buppyspek:	Nov 24th, 2009 at 18:18 GMT	14 points
	I thought the time was good. I'm slow when it comes to math, and "666" was the last answer I got to type in, and I thought that was pretty good for me. Any more time, and it wouldn't be a challenge for the majority of the players. This is good for the average player.

	Jerm:	Nov 24th, 2009 at 19:04 GMT	24 points
	How is "1+2" better known than "1"?

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	gpro22:	Nov 24th, 2009 at 19:12 GMT	6 points
	Woopee, never saw that equation, but it seems to work. I learned [x^2 + x]/2

	JoeGrzzly:	Nov 24th, 2009 at 19:13 GMT	19 points
	Instead of a bunch of people saying 'needs mroe time' why not just vote up the comments that are already there. It is more effective.

	Guinevere:	Nov 24th, 2009 at 19:18 GMT	7 points
	I don't even know what triangular numbers are, and ran out of time at 48/50 just by adding. So if the point is too know triangular numbers (?), there may be too much time.

	zekleinhammer:	Nov 24th, 2009 at 19:26 GMT	19 points
	ended at 666 now i am scared

	beatrixkiddo:	Nov 24th, 2009 at 19:43 GMT	5 points
	very good quiz.

	Platypus222:	Nov 24th, 2009 at 20:14 GMT	6 points
	I remember doing this up to 36 on my calculator all the time and laughig when it ended at 666...

	Beldasnoop:	Nov 24th, 2009 at 20:29 GMT	-2 points
	Ack! Just can't do math fast enough. I got 34.

	Tir_McDohl:	Nov 24th, 2009 at 20:39 GMT	0 points
	Damn, I'm terribly average at calculating. That bugs me a little now.

	GrooGruxKing:	Nov 24th, 2009 at 20:46 GMT	1 point
	45/50. I will definitely be back to play this one.

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	KevinF:	Nov 24th, 2009 at 21:14 GMT	8 points
	My eternal thanks to Wii Bowling's power throws mode on these first few answers.

	Tir_McDohl:	Nov 24th, 2009 at 21:17 GMT	9 points
	lol @ Holyaxe: You're awesome at maths but can't figure that out? I fell in the 48th percentile, but that doesn't mean I only solved half of the exercises; it means there are about as many people better as there are people worse than me. If you scored at the 100th percentile you would have to be alone up there, as soon as there's another one perfecting this game you both will be slightly below the 100th percentile.

	sw1m97:	Nov 24th, 2009 at 21:23 GMT	-4 points
	@rlnintendo- i'm twelve and i also had 13 left

	tsschorr:	Nov 24th, 2009 at 21:42 GMT	-2 points
	24 percentile... why am i so bad at math :/

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	alpha:	Nov 24th, 2009 at 23:32 GMT	6 points
	holy crap did I type that formula wrong in my first post. Should be FN^2/2 + .5FN. I've never downvoted myself before, but I had to for that one.

	Brady:	Nov 25th, 2009 at 00:20 GMT	2 points
	I don't know you if you have or have not changed the time, BUT DO NOT CHANGE THE TIME!!! I finished with the a heart pounding 3 seconds left. This really tried my brain. Good job!

	caligal14:	Nov 25th, 2009 at 00:33 GMT	2 points
	Just another quiz to highlight my less-than-stellar math skills

	girder:	Nov 25th, 2009 at 01:59 GMT	2 points
	i needed one more second....

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	Nosleep:	Nov 25th, 2009 at 02:57 GMT	2 points
	Not terribly difficult, but a fun little mental exercise.

	Golden_Kumquat:	Nov 25th, 2009 at 03:08 GMT	5 points
	Tir McDohl: If you hit the 100th percentile, then you scored better than 100% of people, which would include yourself. So it's not exactly possible. Guinevere: People generally don't know past the first 10 or so numbers. It's not as famous as the square number sequence.

	tball:	Nov 25th, 2009 at 04:07 GMT	1 point
	Just 10 seconds more!!! And I still wouldn't have completed it.