81
0.1154
A whole number is one without digits after the decimal point therefore no number with a decimal point can equal a whole number which means there is no whole number that equals 0.2.
If done correctly, the coefficient of the scientific notation has the same number of significant figures as the whole number.
Integers of 6 digits are normally greater than integers of 5 digits
The number 11 is prime and has two identical digits.
63
81 -- 8+1 = 9 -- square root of 81 = 9
If the sum of the digits of a given number equals nine or a multiple of nine, nine is a factor of that number.
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It is another whole number.
12
There are several hundred of them. One example, the smallest, is 1039
34.
82
12
12
36 is twice the product of its digits multiplied. 3 times 6 equals 18, and 18 times 2 equals 36.