You are given a 10-digit number: 3388766112. In each move, you can select a contiguous group of digits and increase/decrease them all by the same integer, provided that each resulting digit stays between 0 and 9 inclusive. For example, you can select the group 8766 and decrease them all by 3, res...

I previously created a combined slitherlink and sukoku puzzle, but I was unsatisfied because the grid was smaller then a regular sudoku. So I made another, larger one. Below is a 9 by 9 grid. This is filled in with numbers based on the usual rules of sudoku. All of the numbers from 1 to 9 must ap...

Juggie loves food his favorite foods of all were pizzas and chocolates. There was one food he did not like and that was carrots. Juggie's mother told him that he could buy as many pizzas as he liked. But he must buy twice the number of chocolates and more carrots than chocolates and pizza put tog...

In the figure, what is the diameter of the smallest circle assuming the two parallel lines are one unit apart? Attribution: Mine, but wouldn't be too shocked if I only reinvented it.

The notorious pirate Captain Jack Swallow was on the run. He came to a dock and found a tall, old sailor willing to sail him to the nearby island, which was a week away by the sea. Captain Jack realizes that he has no cash to give the sailor, so he offers him his silver chain instead. The silver ...

You are given the first 20 digits of $\pi$: 31415926535897932384. In each move, you can select a contiguous group of digits and increase/decrease them all by the same integer, provided that each resulting digit stays between 0 and 9 inclusive. For example you can increase the first 5 digits by 2,...