Understanding Number(s) and its Sequence

Understanding Number(s) and its Sequence

Number Sequence is the arrangement of number according to a rule.

Even number

These are the number that can be divided by 2. (2 4 6 8 10 12 14 ...) are the first even number. even number are easy to get. Start at 2 (I have also start at 2 below) and keep adding 2 to get the next.

  Keep in mind that even number are number that can be divided by 2 without having a remainder.

Odd number

Sequence of odd number are the simplest to generate (simplest or easiest, you may be thinking even number is the quickest number to generate), all you need to do is to start with number 1 and keep adding 2 (whoosh! Am even adding 2, if you think of the calculation Odd number may be the Quickest).

 You just see how I have be adding 2 with number so far (counting by 2), but what if you meet one of your friend and he/she ask you. please, can you count in threes, fours,fives...?(you don`t have to feel dull to answer that question, we will help you out).

Counting number in threes fours fives

After you learn counting in twos (Even and Odd numbers) here is the next step.
 Counting in threes: It follow the parttern of adding 3 with the 3 you started with (I have explain most of it at Even and Odd), and continue adding to the answer you get from your last addition.

 

Counting in fours

 It`s easy, just keep adding 4 after starting with 4(note that, it also follow the same pattern as the threes explain previous)

Counting in fives

Also keep adding 5 after the starting 5.

(Ha! don`t laugh too much we are trying to teach you multiplication, more on that later).
Note: Don`t let adding 2 to both Even and Odd number (positive /negative) confuse you. keep in mind that Even numbers are divisible by 2, while Odd numbers are not divisible by 2 (only if you multiply the Odd by 2. 2×7 = 14, 14/2 = 7).


Integer number (whole number) may be positive or negative, and the are only one number (1, 5, 2, 3, 4,) not twos are more (12, 22, 45, 89, 9000, 92344,) positive integer are called NATURAL NUMBER / POSITIVE NUMBER (+1, +2, +5) while negative integer are called NEGATIVE NUMBER (-2, -3, -4).

Prime numbers are numbers that are only divisible by 1 and itself (2, 3, 5, 11, 13, 17).
composite numbers are the numbers that can be divided by at least one number other than 1 and itself.

Rational numbers are the type of number that are written in the form of m/n, where n is not equal to zero and m/n cannot be reduced further. (1/2, 3/2, 5/6 or 0.6666666).

Real numbers may be rational (integer/fraction) or irrational numbers (-3, -1/4, 5/2).

Irrational number is a number that`s neither a whole number nor a fraction. In fact it can only be approximated as a non-repeating decimal (π = 3.1415926535897932384...).

Whoosh! you have been talking about numbers since, but you have not mention zero, is zero not a number?
Sorry, zero is a number too, I just want to explain numbers that are seriously use in mathematics before explain zero, zero is a number use as a demarcation between the negative -1 and the positive +1, it`s donated by 0.

Note: Natural number or counting number(1, 2, 3, 4, 5), Integer number, Rational number(integer and fraction), Real number(rational and irrational) are the four groups of important number. don`t forget to comment if you have a question.