A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 
99.
Find the largest palindrome made from the product of two 3-digit numbers.
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The prime factors of 13195 are 5, 7, 13 and 29.
What is the largest prime factor of the number 600851475143 ?
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, …
Find the sum of all the even-valued terms in the sequence which do not exceed four million.
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
Find the sum of all the multiples of 3 or 5 below 1000.
These threads keep popping up everywhere asking whether or not alpha will replace Google. The answer is unquestionably NO. Continue reading
I personally hate attempting to come up with passwords. Everyone always says that you should never use the same one twice and it should contain numbers, characters, symbols, and whatever else you can find on your keyboard. Remembering all those damn words and weird combos is hell.
The source code for a Breathalyzer was recently released and analyzed. The result was appalling. This technology is being used to send people to jail, yet it cannot even do averages right. Continue reading
