Quiz Answer Key and Fun Facts
1. Palindromic numbers are numbers that read the same from left to right and from right to left. In other words, they are "symmetrical" numbers. Which of the following mathematical products does NOT yield a palindromic number?
2. Notice that the year 2002 is a palindrome. So, what will be the next palindromic year?
3. Palindromic primes are numbers that are both palindromic and prime. Which of the following numbers is the greatest 3-digit palindromic prime?
4. The first 5 palindromic primes are 2, 3, 5, 7 and 11. Actually, these numbers are also the first 5 prime numbers. What is the next palindromic prime in the series?
5. Palindromic squares are numbers that are simultaneously palindromic and square. For example, 111 x 111 = 12321. Notice that 111111111^2 (nine 1's) = 12345678987654321. So, is 1111111111^2 (ten 1's) still a palindromic square?
6. The first 3 palindromic squares are 1, 4 and 9. What number comes next?
7. Choose the WRONG statement.
8. Denote a palindromic number (of any digits) as X. Now, reverse the number to get Y. Will the difference between X and Y always be 0?
9. You find a lock on an ancient chest. The password is a 4-digit palindromic number, using the digits from 0 to 9, and you are given that the first digit of the password is 9. You need at most ___ attempts to open the chest.
10. A car meter currently reads 12345. What palindromic number will next appear on it?
Source: Author
Matthew_07
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crisw before going online.
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