How many 3-digits number are Palindromic numbers? A Palindromic number reads the same forward and backward, example 121.	Choose the correct choice from the following choices:
A) 90	B) 610	C) 729	D) 900	E) 1000
Take the task of building palindromes and break it intostages.   Stage 1: Select the hundreds digit   We can choose 1, 2, 3, 4, 5, 6, 7, 8, or 9   So, we can complete stage 1 in9ways   Stage 2: Select the tens digit   We can choose 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9   So, we can complete stage 2 in10ways   IMPORTANT: At this point, the remaining digits are alreadylocked in.   Stage 3: Select the units digit   This digit must be the SAME as the thousands digit (which we already chose in stage 2)   So, we can complete this stage in1way.   By theFundamental Counting Principle(FCP), we can complete all 5 stages (and thus build a 3-digit palindrome) in(9)(10)(1)ways (= 900 ways)   90nswer:90
<result>A</result>
How many 3-digits number are Palindromic numbers? A Palindromic number reads the same forward and backward, example 121.