Enjoy mental workouts?
Use maths occasionally?
Like numerical brainteasers?
Revel in intellectual challenges?
Dabble in computer programming?
Answer "yes" to any of the above, and you've come to the right place!
What is a Puzzlet?
A mathematical problem which will almost always require the use of a simple computer program to solve.
You will need at least a rudimentary knowledge of maths to solve it, and occasionally more. You can use this skill to understand the problem, derive a formula to resolve it if necessary, and define the range within which the answer should fall.
At this stage, you will usually be unable to derive an exact answer, and will have to resort to a simple computer program to go further. You'll have to develop an algorithm, write the code, debug it, and get it to run.
Finally, you need to test your answer for accuracy and completeness. Many Puzzlets have several answers, and part of the challenge is to be sure you've found them all. That, then, is the complete Puzzlet experience!
Itt van peldaul a 151-es:
Look at the prime number 3137. If one digit at a time is deleted, we generate the "sub-numbers" 137, 337, 317, 313. All four new of the sub-numbers are also prime,or sub-primes. Are there any more 4-digit primes which behave in exactly the same way?
