How many 5-digit palindromes contain only even digits?

The correct answer is - 900

Step-by-step explanation:

A palindrome is a positive integer that is same whether read from left to right or from right to left. For example, 123321 palindromes.

An n-digit palindrome is determined from the first  n/2  digits if n is even, and from the first n+1/2 digits if n is odd.

Therefore, if  n  is even, there are  9×10⁽n⁻²/²⁾  palindromes; and if n is odd, there are  9×10⁽n₋²/²⁾ palindromes.  where n is number of digits.

For  n=5 , there are  9×10²=900 palindromes

The answer is true.

Step-by-step explanation:

Certified checks are guaranteed by the bank itself, not just by your signature. This is true. Certified checks are verified by the bank, and the bank persons verify the amount in your bank to see if you can cover the check. They basically look at the funds available in your account before verifying the check. So, yes the answer is true.