8998
The smallest 3-digit palindrome number is 101.
101
1
One. If you mean "digits", the number can have any amount of digits; the only requirement to be called a "palindrome" is that if you read it backwards, you get the same sequence of digits. Thus, any of the following is a palindrome: 1 (any 1-digit number is a palindrome), 55, 121, 2002, 12321, 600006, 8105018, ... As you can see, you can make them arbitrarily large.
No. 101 is prime.
The largest ten digit number with no repeated digits is '9876543210'.
You write the number and then follow it with the digits in reverse order.
There is no number palindrome for 563. A number palindrome is a number which is the same number when the digits are taken in the reverse order. For example, 2002 is the number palindrome of 2002 as it reads the same no matter which way it is read. Whereas 563 when read in reverse is "365" which is not the same as "563". Therefore ,there is no number palindrome for 563.
838
You get the largest number if you sort the digits, from largest to smallest.
0.5714
999