Square, cube, and triangle numbers under 101 Quiz

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Square, Cube and Triangle Numbers Quiz

by wiggytitch

Created Oct 1, 2010 in Science
Featured Dec 22, 2011
Game Plays 22,864

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	witsend:	Dec 22nd, 2011 at 17:27 GMT		13 points
	Even seeing the answers, I still don't get what triangular numbers are!

	Platypus222:	Dec 22nd, 2011 at 17:57 GMT		6 points
	Not sure why "triangle numbers" were included here, but if you're like me and have no idea what they are, check Wikipedia -- http://en.wikipedia.org/wiki/Triangular_number

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	badboy69:	Dec 22nd, 2011 at 18:38 GMT		5 points
	Perfect time! And @cmkeller, no. You add by n+1 for every additional number, starting at 2. Factorial (!) multiplies the number by every number below it, until you hit 1. 4! = 24, which isn't a triangle number.

	Volante:	Dec 22nd, 2011 at 18:49 GMT		3 points
	@Platypus222: I would guess because they're all shapes.

	Beanz57:	Dec 22nd, 2011 at 19:04 GMT		20 points
	For triangle numbers, imagine a set of ten bowling pins. It's a row of 1 pin + a row of 2 pins + a row of 3 pins + a row of 4 pins = 10 pins total. If you add another row, to retain the triangular shape, it would need to be 5 pins. Therefore, you would have 1+2+3+4+5 = 15 pins. It's kinda hard to explain but once you get it, it's easy enough.

	TaliTek:	Dec 22nd, 2011 at 21:50 GMT		2 points
	WOw. 1 second remaining phew. Really good quiz. I for one knew what triangle numbers are, and think it was a good idea to include them. Well done wiggytitch!

	PMdutch:	Dec 23rd, 2011 at 04:26 GMT		5 points
	I am an idiot for not trying 100 in a quiz where you must name the numbers UNDER 101... facedesk

	pablitomiguez:	Dec 23rd, 2011 at 12:31 GMT		1 point
	23/27 is not bad taking into account I did not know what Triangular numbers are. Now I have learned that, they are a kind of "factorial" but using sum instead of multiplication...

	Eskimoed:	Dec 23rd, 2011 at 15:36 GMT		1 point
	Anyone use beirut as a way to calculate the triangular numbers?

	TAR2:	Dec 23rd, 2011 at 21:01 GMT		1 point
	My BS in Mathematics didn't teach me what triangular numbers are.

	Dr_Corndog:	Dec 24th, 2011 at 00:18 GMT		1 point
	I don't think I'd ever even heard the term "triangular number" before this quiz. Had to guess these numbers AND figure that out before the time ran out.

	PMdutch:	Dec 25th, 2011 at 13:01 GMT		1 point
	@Dr_Corndog OR you could just have searched up what it meant before taking the quiz, but hey, your choice to guess what they are :).

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	wiggytitch:	Dec 27th, 2011 at 12:11 GMT		5 points
	@BenjaminJ; I think you're confusing square numbers with prime numbers. Square numbers are the result of a number multiplied by itself e.g. 3x3 = 9. Prime numbers are only divisible by themselves and one. Therefore 1 is a square number (1x1 = 1) but not a prime number.

	mrsiriustab:	Jun 29th, 2012 at 00:09 GMT		2 points
	Anyone else get 3 and 6 for trying 36 in square numbers?

	Ubbiebubbie:	Dec 16th, 2012 at 03:06 GMT		1 point
	I like parallelogram numbers better.

	Sanky:	Jan 2nd, 2013 at 19:48 GMT		1 point
	I think the reason for the large amount of people in the 18-20 range and the all correct range is that people like me who put in every number as fast as they could got around this much, and a lot of people knew the answer.

	Sanky:	Jan 2nd, 2013 at 19:51 GMT		1 point
	Or, as I just discovered, if you only know the square and cube numbers, it puts you in the 18-20 range without knowing the triangle numbers.

	dtb1977:	Apr 25th, 2013 at 10:44 GMT		1 point
	0 should be the first number in each of these lists

	DeliciousPoop:	Apr 26th, 2013 at 18:18 GMT		0 points
	triangle numbers?... i feel like a square