A palindrome is a number that reads the same forward and backward, such as 343. How many odd, 6-digit numbers are palindromes?
Choose the correct choice from the following choices.
A) 400  B) 450  C) 500  D) 900  E) 2500
First recognize you only need to consider the first three digits (because the second three are just the first three flipped)   There are 900 possibilities for the first three digits of a 6 digit number, 100-999 inclusive. Everything starting with a 1,3,5,7,9 will be odd, which is 5/9ths of the combinations.   5/9*900= 
<gadget id="calculator">5/9*900</gadget>
<output>500</output>
500   ANSWER:500
<result>C</result>
A palindrome is a number that reads the same forward and backward, such as 343. How many odd, 6-digit numbers are palindromes?