They make the numbers invisible to the people at Answers.com, possibly.
is called an inequality
64 or 123
That is an ordered number pair. It is normally used to specify a location on a graph, the numbers indicating the values of x and y, in that order.
When using front-end estimation, first you add the front-end digits. Then adjust by estimating the sum of the remaining digits. Then add the two values
They are called the digital roots.
The different digits have different values.
That is the correct spelling of the plural noun "digits" (number values, or fingers).
Individual digits within a number have place values, not whole numbers.
Any even number.
Zero or five.
A single digit in a number can have a place value. A number with several digits cannot.
to show the cardinal and face values
Mutilply the values of the digits.
Some answers have ongoing digits and therefore have unlimited significant digits. For example, 100/3 is 0.3333333... and the 3s are unlimited. Therefore, the number has an unlimited amount of significant digits.
If it's a one-digit number then any 1-digit number will do (0...9) 2-digits numbers : ab=10a+b=a+b it's not possible unless a=0 For 3-digits: abc=100a+10b+c=a+b+c => 100a+10b = a+b it' not possible unless a=b=0 And so on...
infinite number of digits after the decimal point -- pi does not have a finite value.