2 and 3, what could be worse?

Take two numbers that add to 2 and multiply to 3. What is the sum of the reciprocals of these two numbers? The "truly mind-blowing" way to do this is like how I did it, going through the quadratic formula and such. Let a be one of the numbers, therefore the other number is 2-a. … Continue reading 2 and 3, what could be worse?


DLP, or Discrete Logarithm Problem, has an equation used in cryptography. The equation is: y = gx mod p Where y, g, x and p are all integers, and g and p are large primes, like 35201546659608842026088328007565866231962578784643756647773109869245232364730066609837018108561065242031153677 or 14083359469338511572632447718747493405040362318205860500297736061630222431052998057250747900577940212317413063. Now, with the value of g, x, and p known, computers can easily calculate for y. The … Continue reading DLP DLP DLP

Enigma 618: Mysterious divisor

This was a very complicated yet fun-to-do problem. The answer will be posted next.

Enigmatic Code

From New Scientist #1772, 8th June 1991 [link]

In this division sum, the divisor is missing but the rest of the sum is there all right, with different letters substituted for different digits:

Find the divisor and write out the complete sum with the letters replaced by digits.


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