81
0.1154
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.
Multiplying a 2-digit number by a 1-digit number involves multiplying the digits in the ones and tens place and then adding the products. Similarly, multiplying a 3-digit number by a 1-digit number follows the same principle, where you multiply the digits in the ones, tens, and hundreds place and then add the products. The main difference is that in the latter case, you are dealing with three sets of digits to multiply and add, whereas in the former, you only have two sets of 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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12
It is another whole number.
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.