If the number with the digits reversed can have a leading 0 so that it is a 1-digit number, then 16. Otherwise 13.
five digits number when you multiply by four is the same the number when you reversed it is 21978*4 = 87912
The largest ten digit number with no repeated digits is '9876543210'.
Find a four digit number whose digits will be reversed when multiplied by nine?
93 (and 39).
The no. is 35.
You get the largest number if you sort the digits, from largest to smallest.
A number is said to be palindromic when it remains the same when it is reversed. 5 reversed is 5 itself.
The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987