what are palindromic numbers?

Answer 1

It is a number that is the same read backwards - e.g. 101 is the same backwards.

The word "palindrome" comes from Greek for palin {back} and drome {direction}.

I hope that helped.

Here is a useful link:
http://en.wikipedia.org/wiki/Palindrome

Answer 2

A palindromic number is a number (in some base b) that is the same when written forwards or backwards: The first few palindromic numbers are therefore are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111, 121, ...

Here are a few random examples : 535, 3773, 246191642

See how they read the same frontwards OR backwards. The value doesn't change when you read it backwards.

Palindromic Pronic Numbers are defined and calculated by this extraordinary intricate and excruciatingly complex formula. So, this line is for experts only :

base x ( base + n )


In case of n = 1 we speak about our 'pronic' numbers !
Palindromic Pronic Numbers can only begin (and end!) with the digits 2 and 6
and if it terminates in 6, it terminates in 06 or 56.
Every pronic number is the double of a triangular. A quick look at both formulae reveals this fact :
n(n+1)/2 versus n(n+1).

Hope this helps :)

Answer 3

Numbers that are the same backwards and forwards...66, 88,111, etc. A palindromic number is a 'symmetrical' number like 16461, that remains the same when its digits are reversed.

Answer 4

121
12321
Like palindromes, but with numbers

Answer 5

A number that is the same written forwards or backwards
121 etc.

Answer 6

Reads the same forwards and backwards, like 12344321

Answer 7

Numbers that read the same forward and backward..

Answer 8

101, 11, 202, 353, 464 etc