In Mathematics what does the letter  Z refer to and WHY is this letter used to desgnate such numbers.?
112199
Z = set of all integers.\n\nR = set of all rationls\n\nC = set of all complex numbers\n\nN = set of all natural numbers (positive integers)
9490
It's the symbol of exponents. For example 6^2 is 6x6, 5^7 is 5x5x5x5x5x5x5
260276
Letters of the alphabet (upper and lower case) and numbers from 0 to 9.
945730
Just bypass the whole word thing. Letters contain letters. That's not mathematically contradicting.
151654
It's multiplication.\n\n(64500)(0.02) = 1290\n\nScientific notation is 1.29 * 10^3
1062811
The numbers 1, 2, etc are just symbols we give to a identify a quantity.  As for mathematical equations these have been calculated in order to work something out, and then tested repeatedly.  The rules are determined when, using the equation, the answer is always the same and/or predictable.  This is what all scientific theories are.  They are ways of measuring things, which are verifiable.  They have no 'reality' outside our minds, because they are used to measure the world as we perceive it, but they do help us to make sense of the reality that we perceive.
1175202
In general, it means "10 times."\n\nIn math/algebra, it means "10 times a number", but you don't know what the number is, so a letter is placed there: X.
360115
2-M 2-A 2-T Therefore the term in the denominator. Wish you could've posted the exact question. I think -1 has been used to mean rearrangement ie. In what other ways in which MATHEMATICS can be rearranged, leaving alone this particular arrangement MATHEMATICS. If you are a JEE (IIT) aspirant I'd like to meet you. Mail me.
614203
666 as a name or word\n\nAnother interpretation is that 666 is actually some kind of code based on the letters of someone's name or a word. This sparks great public interest since it seems to provide some way to identify the Antichrist. Numerologists like to devise clever ways of assigning numbers to letters so that the letters of a name will add up to this symbolic number. Probably the best-known scheme has A=100, B=101, and so on. With this code, the name "HITLER" adds up to 666. Another commonly cited example is President Ronald Wilson Reagan, where counting the letters of his first, middle, and last name lead to 666. While these ideas are intriguing, they usually require many specific preconditions, like having to start with 100, numbering the surname only, etc. (even though in the former case, you can also number a=1, b=2, and so on and decode his initials 'A' and 'H' as 18, which of course equals 6+6+6.) By adapting the rules however, it is possible to connect most if not all names to the evil number. See also Vicarius Filii Dei. More convincing interpretations invoke more than mathematics to prove their point.\n\n    * For example, scholars who believe the Book of Revelation refers to real people and events argue that the number represents the value of Nero or Neron Caesar (נרון קסר, Nrwn Qsr*, pronounced "Neron Qesar") in Hebrew letters, which also have numerical values under the form of numerology called Gematria (note that Hebrew is written from right to left):
388398
i think the false statement is C. as the degree of any number is always 1. i dont understand the statement b tho :S
195396
What's with the ... ? Is that a space for a number, are you supposed to guess whether to use the + or the x ? I don't get it, I think I'm gonna cry :~(
1142715
The Arabs invented the system of writing numbers that use a zero and positions.  All earlier number systems used different characters to represent "50" than to represent "5" for instance.  The use of the zero makes it easy to write larger numbers than could easily be written in other number systems.  Try to write any number above a million in Roman numerals if you don't believe me...\n\nYes, Arabic *does* use other forms for the numbers (although 1 and 9 are similar to the digits you are familiar with--see sources section below), but the point is that they have the same ten basic digits and use position within the number to express the same ideas.
519094
Yes, zero is a number with a special property x + zero = x.\n\nIn most numeral systems, there is no zero symbol.\n\n0 is a digit who's name is zero.\n\n0 is not 'nothing'.  It is a number that can represent the cardanality of an empty set.\n\nThe greek capitol letter Phi (a circle with an up down line through it) is used to represent the 'empty set' or the set with nothing in it.
67971
Zero was introduced initially, not as a number to be used in computation, but as a position marker to distinguish between such numbers as 123, 1203, 1230, and 1023. The Maya, about the 1st century ad, used a small oval containing an inner arc to denote zero. About five centuries later the Hindus began to use a circle or a dot as a symbol for zero; the dot later fell into disuse. These Indian mathematicians wrote numbers in columns, and they used the zero to represent a blank column. The Hindu word for zero was sunya, meaning empty, or void; this word, translated and transliterated by the Arabs as sifr, is the root of the English words cipher and zerZero was introduced initially, not as a number to be used in computation, but as a position marker to distinguish between such numbers as 123, 1203, 1230, and 1023. The Maya, about the 1st century ad, used a small oval containing an inner arc to denote zero. About five centuries later the Hindus began to use a circle or a dot as a symbol for zero; the dot later fell into disuse. These Indian mathematicians wrote numbers in columns, and they used the zero to represent a blank column. The Hindu word for zero was sunya, meaning empty, or void; this word, translated and transliterated by the Arabs as sifr, is the root of the English words cipher and zero
258171
Zero is neither a positive nor a negative. Its actually the absence of a number. Its the equilibrium of numbers. Its the place where the numbers start\n\nBoth Negative and Positive are RELATIVE to Zero.\n\n-2 means 2 digits below ZERO\n\n+5 means 5 digits Above ZERO.\n\nHope it helps...\n\n.:Fishie:.
1116625
In the UK we tend to say Nought rather than Zero so 8 5 4 9 0 1 7 6 3 2 would be in alphabetical order this side of the pond.\n\nIn France it would be cinq deux huit neuf quatre sept six trois un 5 2 8 9 4 7 6 3 1\n\nIn German it would be acht drei eins funf neun sechs sieben vier zwei 8 2 1 5 9 6 7 4 2\n\nRe the last-but-one contributor\n\nV100 = 10 and 10 + 0 = 10 \nV9801 = 99 and 98 + 01 = 99\nV998001 = 999 and 998 + 001 = 999\nV99980001 = 9999 and 9998 + 0001 = 9999\nV9999800001 = 99999 and 99998 + 00001 = 99999 etc\n\nso not unique but one member of an infinite set of numbers with this property.
435162
zero, that number which, when added to any number, leaves the latter unchanged; its symbol is 0. The introduction of zero into the decimal system was the most significant achievement in the development of a number system in which calculation with large numbers was feasible. Without it, modern astronomy, physics, and chemistry would have been unthinkable as we know them. The lack of such a symbol was one of the serious drawbacks of Greek mathematics. Its existence in the West is probably due to the Arabs, who, having obtained it from the Hindus, passed it on to European mathematicians in the latter part of the Middle Ages. The Maya of Central America and probably the Babylonians also invented zero. With the extension of the number system to negative as well as positive numbers, zero became the name for that position on the scale of integers between −1 and +1. It is used in this sense in speaking of zero degrees on the Fahrenheit and Celsius temperature scales; “absolute zero” is a term used by physicists and chemists to indicate the theoretically lowest possible temperature—a use reminiscent of zero as a symbol for nothing. Unlike other numbers, zero has certain special properties in connection with the four fundamental operations. By definition zero added to or subtracted from any number leaves the number unchanged. Any number multiplied by zero gives zero. Zero multiplied by or divided by any number (other than zero) is still zero. But division by zero is undefined; i.e., there is no number that is the value of a number divided by zero.