123
123 123 123
a set
The numbers are 122, 123, 124 as well as 121, 123, 125.
I believe a ordered set of operations is called a sequence
123
This set of numbers is called "Whole Numbers".
two numbers which are equal to 123:123 + 0122 + 1121 + 2120 + 3 ...
The set of real numbers.
real numbers
With 123 digits you can make 123 one-digit numbers.
The set of numbers that include the natural numbers, their opposites and 0 is called the set of integers.
123 123 123
a set
1, 3, 41, 123.
An infinite amount of numbers. eg 123x1 is 123, 123x2 is 246 and so on
A set with no numbers in it; also called an empty set.