0
Numbers
Numbers are our way to quantify, label, and organize the world around us in a logical manner. However, the systems used to obtain this goal differ geographically, historically, and by relative utility. All questions pertaining to numbers, including historic labeling systems, bases of numerical systems, constants, and the various ways they're grouped together, should be placed into this category.
46,867 Questions
What are some numbers that are not prime or composite?
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
A prime number is a number where it's only factors are 1 and itself. So it would be composite.
What is 0.745 as a mixed number?
Since 0.745 is less than 1, it needs not be expressed as a mixed number. Expressed as a proper fraction in its simplest form, it is equal to 149/200 or one hundred and forty-nine two hundredths.
Why zero divided by zero is not 1?
A division is the answer to a multiplication problem. For example:
(number) = 6 / 3
is the answer to:
2 times (number) = 6
What number do you have to replace here? There is exactly one solution, namely the number 3.
1 / 0 is equivalent to:
(number) times 0 = 1.
This has no solution.
0 / 0 is equivalent to:
(number) times 0 = 0
This has infinitely many solutions; any real number will work. However, in both cases (non-zero divided by zero, and zero divided by zero), it has been shown that dividing by zero causes lots of errors (for example, you can "prove" that 0 = 1; meaning, you can "prove" almost anything, if you carelessly divide by zero). Therefore, division by zero is usually not considered an acceptable operation, especially in pure mathematics.
What is an irrational and a rational number?
Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
What are 26 facts about numbers from A to Z?
Abacus device was once used for calculating numbers in ancient times
BIDMAS is the order of operations in arithmetic
Composite numbers have more than 2 factors
Denominator is the lowest part of a fraction
Exponents increase the values of base numbers
Fractions are parts of whole numbers
Greatest common factor is needed to reduce fractions to their lowest terms
Hindu-Arabic numerals are: 0 1 2 3 4 5 6 7 8 and 9
Infinity is a number with no beginning or any ending
Jupiter was a Roman god whose initials in Latin were IV meaning 4
Kilo means a 1000 = thousand
Lowest common denominator is needed when adding or subtracting fractions
Multiplication is the inverse of division
Numbers still hold their hidden secrets even today as for example prime numbers
One as a number is not a composite or a prime number
Prime numbers have only 2 factors
Quarter is 1/4 or 0.25 or 25%
Roman numerals are: I V X L C D and M
Square numbers can be square rooted evenly
Two is the only even prime number
Underneath the numerator of a fraction is its denominator
V is the Roman numeral equivalent to 5
Whole numbers are also known as integers without fractions or decimals
X is the horizontal number line on the Cartesian plane
Y is the vertical number line on the Cartesian plane
Zero symbol is essential in the Hindu-Arabic numeral system but is not needed in the Roman numeral system
Times it again by the same number
[e.g] square of 4 is 4X4=16 so square of 4 is 16
Odd numbers are numbers that cannot be divided evenly by 2. 253 cannot be divided evenly by 2 so it is an odd number.
1 billion has 9 zeros after the 1. Therefore 827 billion would have nine zeros, like this 827,000,000,000
Does a negative integer equal a positive integer?
No, they can't be equal.
If I take some dollars from you, can the result be the same as if I give them to you ?
If you get on the elevator in the lobby and go down some floors, can you wind up in the
same place as if you go up some floors ?
If you get in your car and back up, can you wind up in the same place as you do when you
get in it and drive forward ?
If you pour milk out of a half-full jug, can the jug wind up with the same amount it has when it's
half full and you pour milk into it ?
