No.
101, 111, 121, 131, 141, 151, 161, 171, 181 and 191.
101, 111, 121, 131, 141, 151, 161, 171, 181, 191
The sum of the number of digits in all the numbers between 31 and 400 inclusive is 1041.
All palindromes between 10000 and 99999 are of the form abcba where a is a digit in {1, 2, ..., 9} and b and c are digits in {0, 1, ..., 9} All multiples of 25 end in 00, 25, 50 or 75. As a cannot be 0, this means the only multiple of 25 we are interested in are those which end in 25 and 75. This means we are looking for integers of the form 52c25 and 57c75. There are 10 possible values for the digit c in each case (one of {0, 1, ..., 9}), which means: There are 20 palindromes between 10,000 and 99,999 which are divisible by 25.
Yes all numbers can turn into palindromes
No.
All of them.
109, if you don't count all the single digit numbers as palidromes.
101, 111, 121, 131, 141, 151, 161, 171, 181 and 191.
101, 111, 121, 131, 141, 151, 161, 171, 181, 191
The sum of all prime between numbers 1 and 400 (2 through 399) is 13,887.
The sum of the number of digits in all the numbers between 31 and 400 inclusive is 1041.
22 and 22.22
H O S X Z Some words with horizontal symmetry are: * mom * wow Also, words with horizontal symmetry are palindromes. All horizontal symmetrical words are palindromes, but not all palindromes have horizontal symmetry. (like racecar)
all i know of is 1,2,4,5,50,and 100 BUT who cares about math, well certainly not me!:)
216 & 343