Can you name the mathematical terms described? by TheMathmagician

Clue	Answer
The name for the + sign
The name for the - sign
The name for the x sign
The name for the / sign
The name for the = sign
The name for the > sign
The name for the < sign
The name for the ! sign
What is the trig ratio defined as opposite/adjacent?
What is the trig ratio defined as opposite/hypotenuse
What is the trig ratio defined as adjacent/hypotenuse
What is the trig ratio defined as adjacent/opposite
What is the trig ratio defined as hypotenuse/adjacent
What is the trig ratio defined as hypotenuse/opposite
N represents what set of numbers?
Z represents what set of numbers?
Q represents what set of numbers?

Clue	Answer
C represents what set of numbers?
R represents what set of numbers?
What is the name of the inverse function of the exponential?
What name is given to numbers with no factors apart from itself and 1?
What type of triangle has 3 equal sides?
What type of triangle has 2 equal sides?
What type of triangle has no equal angles?
There are 360 of which unit of angle measure in a circle?
What unit of angle measure is broken into 400 parts?
What unit of angle measure must be used in calculus?
What is the 'posh' name for the inverse function to #9
What is the 'posh' name for the inverse function to #10
What is the 'posh' name for the inverse function to #11
What is the expression obtained after differentiation called?
What is the correct term for a 'top heavy' fraction?
What is the name of equation expressed in terms of an additional parameter (usually 't')
Name for the x and y co-ordinate system

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There are 30 comments for this game.
(Warning: comments may contain spoilers)

Maths Talk 1 Quiz

by TheMathmagician

Created Dec 14, 2009 in Science
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	Shay:	Dec 15th, 2009 at 00:42 GMT		7 points
	This quiz should really have to be answered in order, otherwise e.g. you could guess all the trig functions without knowing which is which. You need to capitalize 'cosine'. If you write 'Natural numbers' and 'Prime numbers' you should also write 'Rational numbers', 'Complex numbers' and 'Real numbers' rather than 'Rational', 'Complex' and 'Real'. The inverse function of the exponential is the 'logarithmic function' not the 'logarithm'. Just answering 'isosceles' doesn't seem to work for the two-equal-sides question, and I have no idea why you put 'right-angled' as an alternative answer - that has nothing at all to do with 2 equal sides. Degrees are not broken into 360 parts, it's just that 360 degrees is the number of degrees in a full rotation.

	TheMathmagician:	Dec 15th, 2009 at 01:07 GMT		5 points
	You were right with the isosceles thing. And with your other suggestions. I'll get the quiz changed

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	brownetown:	Dec 15th, 2009 at 14:21 GMT		-4 points
	31 and 33 are poor in comparison with the others because they pretty much have the answer in the question

	thorknee:	Dec 15th, 2009 at 14:59 GMT		-4 points
	What does posh mean?

	max123:	Dec 15th, 2009 at 18:22 GMT		-1 points
	Accept 'more than' and 'less than'? and a right angled triangle can have two equal sides, its just a special isosceles, Shay.

	MrPiSquared:	Dec 15th, 2009 at 19:58 GMT		7 points
	I agree, a right angled triangle can be isosceles. And imaginary numbers aren't the same as complex numbers. Imaginary numbers aconsist of only imaginary components, while complex numbers can have real components too. That's why it doesn't accept imaginary I think

	Bertonium:	Dec 16th, 2009 at 00:27 GMT		2 points
	Very tricky with the gradians there. Haven't seen those since I broke my TI-30! One beef: Careful with the '!' sign. I know it's most common use is for the factorial, but I found myself typing "unique," as in the proof shorthand that involves an upside-down 'A', a backwards 'E', etc. Maybe you could be more specific.

	kinglarryxvii:	Dec 16th, 2009 at 01:08 GMT		-1 points
	Should accept 'Natural Logarithm' for number 20. When you say the exponential function, it implies e^x.

	MrPiSquared:	Dec 16th, 2009 at 11:35 GMT		6 points
	I thought an exponential function was just one that had a number to some exponent, usually an expression with a variable.

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	alexburlton:	Dec 17th, 2009 at 20:45 GMT		0 points
	for logarithmic, could you not except "log" or "logx" or lnx or something? also i dont like the inconsistency with plurals - you accept "degree" for degrees but for radians and gradians only the plurals were accepted.

	beforever:	Dec 25th, 2009 at 05:49 GMT		1 point
	I think everything was alright, but was just a little bit taken aback when 'equal' didn't get accepted, but thought about it, and then entered the 's', so all is good. I think it's a good job, and a lot better than 90% of the junk you find contributed on Sporcle now. I also think that answers should be answered in order. Good job.

	Danmcp:	Dec 25th, 2009 at 05:50 GMT		0 points
	Got everything but improper fraction. I kept reading the question as top heavy function for some reason...

	TheMathmagician:	Dec 30th, 2009 at 11:18 GMT		8 points
	Hello, I have had quite a few people request that I set the quiz so that you have to answer the clues in the order they are given. I can do this if people think it would improve the quiz. So if you want to make this change, then 1add a point to my comment, and if you want to keep it as it is, then deduct a point from my comment. I'll check my comment at the end of the week, if it is positive, I'll make the change, and if it is negative, then I'll leave it as it is. I hope that sounds fair!

	imclala:	Jan 13th, 2010 at 16:45 GMT		-1 points
	I agree they should be answered in order. I don't know what you meant by "posh," so I kept trying tanh, sinh, and cosh and couldn't get them to work (obviously). Good quiz!

	kypzethdurron:	Mar 12th, 2010 at 09:17 GMT		3 points
	Just cautious that in my Astrophysics degree we use different letters to denote those that you mention and that other things have differing names. Also I have heard "times" used for "multiply" quite a lot in reference to the symbol so may be worth adding that?

	brs:	Mar 13th, 2010 at 03:07 GMT		-1 points
	/ is not the symbol for division, that's a substitute for computers. The correct symbol is ÷.

	Julie:	Mar 13th, 2010 at 04:27 GMT		7 points
	if you refer to numbered questions, you should number the questions.

	Secret_Asian_Man:	Mar 13th, 2010 at 12:04 GMT		3 points
	Accept grads.

	naturefreak2101:	Mar 13th, 2010 at 21:06 GMT		1 point
	There are a number of secondary answers (not just abbreviations) that are missing. Simple things like plurals (i typed "integers" too quickly and didn't catch integer).

	nero_sable:	Mar 18th, 2010 at 19:48 GMT		0 points
	The inverse of the exponential function is the natural logarithm. A logarithmic function could be to the base anything, whereas the natural logarithm is specifically to the base e.

	tessacar:	Mar 18th, 2010 at 21:21 GMT		-1 points
	i always called the x and y coordiante system a coordinate plane. and i think a reciprocal should be on this quiz! but it was still fun!!! awesome quiz!!!

	bloop:	Apr 21st, 2010 at 02:01 GMT		0 points
	i can't believe i blanked on "factorial"! i kept thinking of other entirely false f words like "fraction". i also can't believe i couldn't think of the word parametric. doh!

	stephenbeck:	Apr 26th, 2010 at 03:29 GMT		1 point
	Eh, decent quiz. I don't think you need all 6 trig functions - if you can get like 2 you probably know the rest. You should have known you needed a better phrase when you had to say "posh" in the inverse trig ones. I'm really surprised that parametric is so far down on the results, given that 'parameter' is in the question. It would also be a much more interesting quiz for those that took math beyond calculus to have harder questions like: what is the (most famous?) function, of Legendre, that extends ! to R and C? (Gamma). Or, what do you call a set that is closed, associative, and has an identity under one operation? (a group). Under two operations (almost)? (a field).

	Tautology:	Apr 26th, 2010 at 14:01 GMT		2 points
	Oh, isosceles triangles. Your complex spelling will forever elude me.

	Enormatron:	May 13th, 2010 at 00:27 GMT		0 points
	This is pretty late but I think I should mention this in a comment. The thing is, an exponential function refers to a^x for any a, where THE exponential function is e^x. That said, THE logarithmic function is what is known in high school as the "natural log." In higher math and physics, "log" always represents the log of base e. Log base 10 is sometimes used by scientists and statisticians to find the order of magnitude of a number, but from an analytical standpoint, 10 is just an arbitrary number as a base for log, simply because e is the only really useful base to use. tl;dr The logarithmic function and the natural log are the same thing.

	Joek295:	May 24th, 2010 at 08:24 GMT		1 point
	Was confused with arctan, arcsin, and arccos. It would be clearer if you numbered the questions and put 'Question #9' instead of just '#9' Also couldn't get derivative, despite the fact that I have a calculus exam on thursday. Kept typing dy/dx.

	skxrot:	Jul 9th, 2010 at 07:51 GMT		1 point
	"You have to do calculus with this unit" is a ridiculous hint for so many reasons.