EgmatQuantExpert wrote:
Solution
Given:• A palindrome is a number that reads the same forward and backward.
To find:• By using the numbers from 1-9, how many 5-digit palindromes can be created
Approach and Working: Let the 5-digit number is abcba.
So, we need to find the in how many we can fill a, b, and c since the last two digits will take the same number.
• a can take 9 numbers from 1-9.
• b can take 10 numbers from 0-9.
• c can take 10 numbers from 0-9.
Thus, way to form a 5-digit palindrome number= 9 * 10 * 10 *1 *1=
729.
Hence, the correct answer is option D.
Answer: D EgmatQuantExpert , a couple of items are inconsistent.
It appears that Question #2:
1) ought to list 0-9 as the digits that are available in both topic threads (the
solution prompt needs to be edited to match original);
2) ought to have a calculation error corrected.
Issues(1) 0-9 or 1-9?
In the original prompt for Q #2, the available digits are integers 0-9. In the solution prompt (please see highlights above), both (1-9) and (0-9) are listed.
The original prompt for Question #2 that lists 0-9 is
HERE Quote:
By using the numbers from 0-9, how many 5-digit palindromes can be created.
(2) the second post on Q#2 solution has a calculation error, although the OA is listed correctly.
Quote:
Thus, way to form a 5-digit palindrome number= 9 * 10 * 10 *1 *1= 729.
(9 * 10 * 10 * 1 * 1) =
900, not 729.
It appears that Questions #1 and #2 got mixed up. The answer to Question 1
HERE, (answer is
HERE) is 729.
In Question #1, the digits are limited to 1-9.
I think Q#2
-- needs to state that integers are 0-9 in all posts and
-- needs to have the written answer changed to 900
Would you please correct the inconsistencies?