GeekDad Puzzle of the Week – Palindromic Products
The largest three-digit palindromic product of two, two-digits numbers is 999 = 37 x 27, and the smallest four-digit palindromic product of two, two-digit numbers is 1001 = 91 x 11. The largest four-digit palindromic product of two, two-digit numbers?
Brute Force or is there an easy way?
There are 19 two-digit palindrome numbers. There are 18 times 9 three-digit ... Brute force solutions only work for small problems. This is of course one of the problems with assigning small problems or small data sets for student projects.
The 11 Beers of Christmas
November 2011 provided such an opportunity. The date 11/11/11 also has other interesting aspects. The two digit writing is a palindrome and taking the four digit year of your birth and add it to the age you will be this year, the result is 2011.
some strange numbers
> did not get it: 16 is only No. (besides 1) of form xy=yx. are 17, 23 and many more numbers not same? he want to say 16 is the only no. which can be expressed in the x^y=y^x (4^2=2^4) where x and y denote 2 different natural numbers.... did not get it: 16 ...
Integers and Sequence (Solution)
100 is between the fourth and fifth power)= 40 (the only two digit number n such that 2 n ends with ... 4030 (the second-largest three-letter palindrome in Roman numerals)/((the smallest composite number not divisible by any of its digits)/(the last ...