Math Terms: A to Z Quiz

Clue	Term	Letter
Branch of mathematics that substitutes letters for numbers		A
Cut into two congruent halves		B
Distance around the outside of a circle		C
Bottom part of a fraction		D
Notation indicating the number of times a quantity is multiplied by itself		E
Ratio of numbers or variables		F
Various types include analytic, Euclidean and non-Euclidean		G
Longest side of a right triangle		H
Triangle where two sides are the same length		I
Definition, postulate, or theorem which enables a conclusion to be drawn		J
Unit of length equal to 1,000 meters		K
Straight path connecting two points and extending beyond the points in two directions		L
Arithmetic average		M

Clue	Term	Letter
Real number less than zero		N
Polygon with eight sides		O
Two distinct coplanar lines that do not intersect		P
Result of dividing two numbers or expressions		Q
Line segment between the center and point on a circle		R
Three dimensional solid consisting of all points equidistant from a given point		S
Assertion that can be proved true using the rules of logic		T
The result of combining elements of two sets		U
Corner point of a geometric figure		V
Non-negative integers		W
The first number indicated in an ordered pair		X
Three feet		Y
Number that indicates no quantity, size, or magnitude		Z

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Math Terms: A to Z Quiz

by soxfan1

Created Apr 4, 2010 in Science
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	Just_Fold:	Apr 4th, 2010 at 15:47 GMT	3 points
	x-axis is a line, not a width. The width of an object is a distance. I suggest using 'x-coordinate' defined as 'the first number indicated in an ordered pair'. Hope this helps.

	soxfan1:	Apr 4th, 2010 at 15:52 GMT	0 points
	To Just_Fold: Thanks! I made the change.

	miyomiyo1:	Apr 4th, 2010 at 15:57 GMT	5 points
	"Algebra" is defined poorly, as variables are used in nearly every area of math; "divisor in fraction form" may be a better clue than "bottom part of a fraction" for D; you may wish to choose a different word than "Justification" for J, as I have rarely heard it used in this context; "Kilometer" and "Yard" are not math terms; "average" may refer to mean, median, or mode depending on context; "real number" is unnecessary in the N clue since you say it is less than zero (complex numbers do not have a notion of "less than"); coplanar is spelled incorrectly in the P clue; a sphere is a surface, not a solid (a ball is a solid); a "Union" is the resulting set, not the action of combining; "intersection of lines in a polygon" may be a better clue than "corner point of a geometric figure" for V; the X clue is far from the definition of the X-axis. Good concept, but mediocre execution. @ Just_Fold: While x-coordinate is a good idea for an answer, "the first number indicated in an ordered pair" is not a good clue, as ordered pairs do not refer solely to points in the coordinate plane. Perhaps "horizontal component of a point in the coordinate plane" would be a better clue for x-coordinate, or "a polynomial intersects this at its roots" for x-axis.

	Flick:	Apr 4th, 2010 at 16:07 GMT	4 points
	You missed off the other two types of average (both of which also begin with the same letter). Liked the quiz mind. PS please accept kilometre

	soxfan1:	Apr 4th, 2010 at 16:33 GMT	-1 points
	To miyomiyo1 and Flick: Thank-you for your suggestions. I made some updates but still think that the definition for M is accurate. The median is the middle value and the mode is the number occurring most often.

	miyomiyo1:	Apr 4th, 2010 at 16:41 GMT	6 points
	What do you think average is? Average is not defined as the mean, it is defined as a "central tendency" or a "middle value" or an "expected value". There are three averages: mean, median, and mode; you can't really disagree with a definition.

	miyomiyo1:	Apr 4th, 2010 at 16:46 GMT	5 points
	You changed the definition of algebra, but you just paraphrased it; it's still incorrect (and slightly more so now). As it stands, A, M, S, and X are still incorrect, D and V are defined in a "silly" way, for lack of a better word, and N is redundant. Keep in mind that I'm not really making "suggestions" here as much as "corrections"; math is a well-defined body of work with strict definitions, and you can't choose whether or not to follow them.

	PaladinWhite:	Apr 5th, 2010 at 15:31 GMT	1 point
	"Wholes" should be accepted for non-negative integers.

	soxfan1:	Apr 6th, 2010 at 23:17 GMT	1 point
	To PaladinWhite: Got it! Thanks.

	kagomeshuko:	May 13th, 2010 at 03:59 GMT	1 point
	Fun, thanks.

	GreatGopher:	Jun 2nd, 2010 at 00:57 GMT	3 points
	@miyomiyo: "Average" and "mean" are used pretty much interchangeably for many years of basic mathematics. Your argument is technically correct, but I don't think the writer needs to be that picky for the purposes of the quiz. It should be obvious to most people. But "J", on the other hand, is a terrible word and definition. Maybe Jacobian, jerk, or joule would work better.

	Flatlined:	Feb 8th, 2011 at 21:52 GMT	0 points
	The median and the mode are not the average in mathematical terms. In cultural terms or any other setting, the mode could be the average, but not necessarily the median. I agree with soxfan for leaving it just as mean. I really enjoyed the quiz, though I missed a couple (from ignorance).