# Is trizillion a number?

# What is a DID number?

Answer .
\nDID stands for Direct Inward Dial. Also know as DDI, Direct Dial In. It is when a phone on a private telephone switch can be dialled directly from any phone in the world. The last few digits of the number dialled are know as the DID number. For example, a telephone extension number 44…00 might be dialable from anywhere as +35318784400. ( Full Answer )

# What is a number?

A number is something that has a value of some sort, and adding two numbers, will get you another value.

# What are numbers?

Number are things that you count up to the number infinaty!.
Number are things that you count up to the number infinaty!

# Numbers that have an odd number of factors are?

Perfect squares ( also called square numbers) have an odd number offactors and primes squared have 3 factors. Brief Explanation: If you start with a prime number, it has 2 factors by definition.Square that number and you have 3 factors, which is an odd number.So primes squared always have an odd nu…mber of factors. Forexample, 5 has 1 and 5 as factors, 25 has 1,5, and 25. What about an odd number such as 21 which is not the square of aprime. It has factors 1, 21, 3 and 7 so an even number of factors.How about 27, 1,27, 3, 9 once again even. What I was trying to show is that factors of numbers come in pairsand so only certain numbers will have an odd number of factors.Let's look at one more perfect square that is not a prime squared.How about 16 which is 4 squared. The factors are 1,2,4,8,and 16 which is an odd number of factors. Looking at these as pairs we see the factor pairs of 16 are 1 x 16,2 x 8, and 4 x 4, giving us the factors of 1, 2, 4, 8, and 16 - anodd number of factors. So we conclude that perfect squares have an odd number of factorsand primes squared have 3 factors. ( Full Answer )

# Why do we have numbers?

So we can count our cash and so you have more to learn in school.

# What is 'what is my number about?

it reallyy depends which number,,,,, if its on the side of the valve (2) then its the mosel ,,,, anywere else and its the serial number

# What is a number which is a square number and triangle number?

36 = 6 2 = Triangle(8) The triangle number formula: T(n) = (n 2 +n)/2. Here is T(8) graphically: . 1 = T(1) = 1 .. +2 = T(2) = 3 ... +3 = T(3) = 6 .... +4 = 10 ..... +5 = 15 ...... +6 = 21 ....... +7 = 28 ........ +8 = 36 36 = 6 2 , graphically: . . . . . . . . . . . . … . . . . . . . . . . . . . . . . . . . . . . . . ( Full Answer )

# What number is a whole number but not a natural number?

100 and above...numbers never end! * * * * * Rubbish answer! Any negative integer is a whole number but not a natural number. Some people include 0, others do not.

# What number are whole number?

What numbers are whole numbers? Whole numbers are numbers with no value after the decimal point. For example: 1 is a whole number. 1.2 is not a whole number. yes and 1.22 is not one and 1.22222222 is not one is only 1,2,3,4,5,6,7,8,9, continue but i dont know if a negetive number counts as a whole n…umber or zero if it counts as a whole number ( Full Answer )

# Why is number 1 not a prime number?

The number one is far more special than a prime! It is the unit (the building block) of the positive integers, hence the only integer which merits its own existence axiom in Peano's axioms. It is the only multiplicative identity (1 . a = a . 1 = a for all numbers a ). It is the only perfect …n th power for all positive integers n . It is the only positive integer with exactly one positive divisor. But it is not a prime. So why not? Below we give four answers, each more technical than its precursor. Answer One: By definition of prime. The definition is as follows. A natural number is a prime number if it has exactly two unique factors: one and itself..
One is eliminated, because its 'two' factors, 1 and 1, are not unique. Answer Two: Because of the purpose of primes. The formal notion of primes was introduced by Euclid in his study of perfect numbers (in his "geometry" classic The Elements ). Euclid needed to know when an integer n factored into a product of smaller integers (a nontrivial factorization), hence he was interested in those numbers which did not factor. Using the definition above he proved: .
The Fundamental Theorem of Arithmetic Every positive integer greater than one can be written uniquely as a product of primes, with the prime factors in the product written in order of nondecreasing size. .
Here we find the most important use of primes: they are the unique building blocks of the multiplicative group of integers. In discussion of warfare you often hear the phrase "divide and conquer." The same principle holds in mathematics. Many of the properties of an integer can be traced back to the properties of its prime divisors, allowing us to divide the problem (literally) into smaller problems. The number one is useless in this regard because a = 1 . a = 1 . 1 . a = ... That is, divisibility by one fails to provide us any information about a . Answer Three: Because one is a unit. Don't go feeling sorry for one, it is part of an important class of numbers call the units (or divisors of unity ). These are the elements (numbers) which have a multiplicative inverse. For example, in the usual integers there are two units {1, -1}. If we expand our purview to include the Gaussian integers { a + bi | a, b are integers}, then we have four units {1, -1, i , - i }. In some number systems there are infinitely many units. So indeed there was a time that many folks defined one to be a prime, but it is the importance of units in modern mathematics that causes us to be much more careful with the number one (and with primes). Answer Four: By the Generalized Definition of Prime. (See also the technical note in The prime Glossary' definition). There was a time that many folks defined one to be a prime, but it is the importance of units and primes in modern mathematics that causes us to be much more careful with the number one (and with primes). When we only consider the positive integers, the role of one as a unit is blurred with its role as an identity; however, as we look at other number rings (a technical term for systems in which we can add, subtract and multiply), we see that the class of units is of fundamental importance and they must be found before we can even define the notion of a prime. For example, here is how Borevich and Shafarevich define prime number in their classic text "Number Theory:" An element p of the ring D, nonzero and not a unit , is called prime if it can not be decomposed into factors p = ab , neither of which is a unit in D..
Sometimes numbers with this property are called irreducible and then the name prime is reserved for those numbers which when they divide a product ab , must divide a or b (these classes are the same for the ordinary integers--but not always in more general systems). Nevertheless, the units are a necessary precursors to the primes, and one falls in the class of units, not primes. ( Full Answer )

# Is number 18 a prime number?

No, because it is divisible by both 2, 3, 6 and 9, as well as with 1 and itself. A prime number is only divisible by 1 and itself.

# Is the opposite of a number equal to the number?

Is losing $20, the same as gaining $20? Is driving 50 miles North the same as driving 50 miles South? Of course not!! Negative numbers are not the same as positive numbers!! True, but that does not apply to all numbers: 0 is the same as its additive inverse. 1 and -1 are the same a…s their multiplicative inverses. ( Full Answer )

# What number is a square and triangle number?

36 is both a square number and a triangle number as it is: 6x6=36 and the square numbers are: 1, 3, 6, 10, 15, 21, 28, 36 , 45,55, 66, 78. xx

# What are numbers that have no prime numbers?

Well, when you think about it, all numbers that are even numbers are prime numbers... except 2 ISN'T a prime number!

# Which number is median out of 24 numbers?

To get the median, you need to arrange them in order of size and then take the average of the middle two (12th and 13th) numbers.

# Is the number 13 an abundant number?

No it isn't. The factor sum is 14 and the double of number is 26 so it is not an abundant number

# Why are the numbers called triangular numbers?

1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 105, 120, 136, 153, 171, 190, 210, 231, 253, 276, 300, 325, 351, 378, 406, 435,

# What number is roman number X?

The roman numeral X stands for 10 1 = I 2 = II 3 = III 4 = IV 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX 10 = X

# Is a whole number a natural number?

There is some disagreement as to whether zero, a whole number,belongs to the set of natural numbers.

# Which numbers are odd numbers?

Odd numbers are integers (whole numbers) that are not divisible by 2: 1, 3, 5, 7, ..., -1, -3, -5, -7...\n Odd numbers are integers (whole numbers) that are not divisible by 2: 1, 3, 5, 7, ..., -1, -3, -5, -7...\n Odd numbers are integers (whole numbers) that are not divisible by 2: 1, 3, 5, 7, ..…., -1, -3, -5, -7...\n Odd numbers are integers (whole numbers) that are not divisible by 2: 1, 3, 5, 7, ..., -1, -3, -5, -7...\n ( Full Answer )

# How do you write 2207 in numberic number?

Not sure what you mean by a "numberic number", but try these: Two thousand two hundred (and) seven or 2.207 x 10 3

# What is as a number?

I found some definitions online: .
the property possessed by a sum or total or indefinite quantity of units or individuals; "he had a number of chores to do"; "the number of ... .
a concept of quantity involving zero and units; "every number has a unique position in the sequence" .
act: a short …theatrical performance that is part of a longer program; "he did his act three times every evening"; "she had a catchy little routine"; "it was one of the best numbers he ever did" .
phone number: the number is used in calling a particular telephone; "he has an unlisted number" .
numeral: a symbol used to represent a number; "he learned to write the numerals before he went to school" .
total: add up in number or quantity; "The bills amounted to $2,000"; "The bill came to $2,000" .
issue: one of a series published periodically; "she found an old issue of the magazine in her dentist's waiting room" .
give numbers to; "You should number the pages of the thesis" .
a select company of people; "I hope to become one of their number before I die" .
enumerate; "We must number the names of the great mathematicians" .
a numeral or string of numerals that is used for identification; "she refused to give them her Social Security number" .
count: put into a group; "The academy counts several Nobel Prize winners among its members" .
a clothing measurement; "a number 13 shoe" .
count: determine the number or amount of; "Can you count the books on your shelf?"; "Count your change" .
the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural); "in English the subject and the verb must ( Full Answer )

# Is the number 28 a cube number?

No 3 cubed is 27 4 cubed is 64 Strictly it is the cube of the cube root of 28. The common description is that it is not a perfect cube.

# What number is a squared number and cubed number?

Any number to the 6th power will be both a squared number and a cubed number. The first 10 such numbers are: 1 64 729 4096 15625 46656 117649 262144 531441 1000000

# Why is the number 200 not a prim number?

You can tell right away just by looking at it that it's divisible by 10. A number isn't prime if it's divisible by anything else besides '1' and itself, and we found another one right away, so we already know that 200 can't be a prime number. Actually, 200 is divisible by: 1, 2, 4, 5, 8, 10, …20, 25, 40, 50, 100, and 200, so it's really kind of a long way from being a prime number. ( Full Answer )

# What numbers a re prime number?

All numbers that only have one and itself as factors are prime. Therefore, to tell if a number is prime simply find it's factors. If it has more than two factors than it is not a prime number.

# What number is not an even number or a square number?

There is an infinite amount of these numbers. Ex. 11, 13, 15, 17, 19, 21, 41, 51, 71, 123.

# Can a square number be a decimal number?

Yes. 25 = 25.0 i a decimal number and is the square of +/- 5 2.25 is the square of 1.5

# What is the biggest number out of all the numbers?

Numbers are unlimited... The largest one I can think of with a specific name is Graham's number. It's so large that writing it, even in scientific notation, would require more space than there is in the entire universe. However, it's possible to come up with algorithms to generate even larger num…bers, like Tree(3). The link to the Wikipedia article on Graham's number contains links to some other very large numbers. ( Full Answer )

# What are the numbers of composite numbers?

A composite number is a positive integer that has a positive divisor other than one or itself.

# What is the opposite number of the number 10?

-10 or 0.1 are the best candidates. The first being the additive inverse and the second being the multiplicative inverse. But there are other possibilities.

# Who is number is this 07023037566 were does this number come from?

how did you come by this number? 07023037566 is somebody's mobile phone number probably. the number, however, is 7 billion, 23 million, 37 thousand, 5 hundred and 66.

# Are natural numbers real numbers?

Yes, all natural numbers are real numbers. Natural numbers are a subset of real numbers, so not all real numbers are natural numbers.

# Whole numbers are rational numbers?

Yes, since any integer x can be expressed as x/1, which is a rational number since both x and 1 are integers.

# Why is the number 32 a lucky number?

I saw a truck marked 32 and i gambled on it and it won so use numbers visible to you and form a set of lotto numbers who to tell you might just be lucky

# Why the number 133 not a prime number?

Well because it can be divide by 19 and 7 by 1 and its self. A prime number can only be divided by 1 and its self. In this case the number 133 is not only divisible by 1 and itself it is also divisible by 19 ,7 which makes it composite.

# How do you know if a number is a prime number or not?

You will know because a prime number can only be divided by itself and one (1), if it can be divided by anything else then you will know that it is not a prime number.

# Avogadro's number was calculated as the number of what?

It's the number of molecules in a mole of that substance. Eg. 6.02*10 23 molecules of Oxygen = 1 mole of Oxygen

# What is the maximum number of factors a number can have?

There is no upper limit. For example, take the powers of 2: 1 has 1 factor (1), 2 has two factors (1, 2), 4 has 3 factors (1, 2, 4), 8 has 4 factors (1, 2, 4, 8), etc.; you can keep multiplying indefinitely by 2, to add one more factor.

# Why is the number of neutrons the atomic number?

the number of neutrons is not the atomic number. The atomic number of an atom is the atoms number of protons. The number of protons is same as the number of electrons. The number of protons is used as the atomic number so that the elements can be easily organized in polarity size and bonding pro…bability. ( Full Answer )

# Which numbers have the greatest number of significant numbers?

The significant digits in a number can be arbitrarily small or large in number, according to the method of creating them. Numbers that can have an infinite number of possible significant digits are called transcendental numbers .

# Can a number be a natural number and a real number?

All natural numbers are also real numbers, but all real numbers are not necessarily natural numbers because natural numbers are positive whole numbers. Real numbers are any number on the number line, which includes irrational numbers like pi and sqrt2. Thus only the positive natural numbers are both… natural and real. Hope this is not too long-winded! ( Full Answer )

# Is there a number that is a cube number and a square number?

Yes - there is an infinite number of such numbers. Just take the counting numbers (1,2,3,4, etc...) and put them to the power of 6 (i.e. multiply it by itself 6 times). The sequence of such numbers starts: 1, 64, 729, 4096, 15625, 46656, etc...

# What number is not an even number and or a square number?

25 25 is not even and is a square. 3 is not even or a square.

# What number has no numbers?

The number zero, 0, has no numbers. It has been given a number but contains nothing. The definition of zero is 'A cardinal number indicating the absence of any or all units under consideration.' (see related link for verification.)

# What is a rational number number which is not a rational number?

There is no such thing as a number that is both rational andirrational. By definition, every number is either rational orirrational.

# What number is a real number and an irrational number?

An irrational number is a number that doesn't stop and doesn't have a pattern.. Ex: 3.144734349... A real number is when you add 0 to whole number (1,2,3,4...)

# What are numbers that are multiplied or numbers that are divisible by a number?

because 6 is an even number so it is very common to have it divided by 6

# What numbers are cubed numbers and prime numbers?

A number can't be cubed and prime. Cubed numbers (other than 1) have more than two factors.

# What is a number that is a natural number and an irrational number?

Natural numbers are a part of rational numbers. All the naturalnumbers can be categorized in rational numbers like 1, 2,3 are alsorational numbers.Irrational numbers are those numbers which are notrational and can be repeated as 0.3333333.