LK Forge

Where to get free, print-ready sudoku with answer keys and no sign-up, which of the four difficulty levels to start on, how to print the grid so it comes out clean (100% scale, test page, save a PDF), and the solving techniques - naked singles, pencil mar

A cup is a unit of volume, not weight. Across nine common ingredients the same one-cup volume ranges from 89 g of oats to 237 g of water - a 2.66 spread. A cup of sugar is 65% heavier than a cup of flour, and granulated sugar outweighs powdered sugar by 7

California's 7.25% is the highest statewide base sales-tax rate; five states (Alaska, Delaware, Montana, New Hampshire, Oregon) charge 0%. Across all 50 states plus DC the average base rate is 5.11% and the median is 6%. The complete ranked table, plus th

Three live counts of the natural world, fetched from public feeds: M4.5+ earthquakes in the last 30 days (USGS), active US weather alerts right now (NWS), and near-Earth asteroid close approaches in the next seven days (JPL). Each number updates live and

A live experiment, currently gathering data: take a standardized 60-second typing test and your anonymized net WPM and accuracy join a public dataset. Add a result and watch the speed distribution grow.

Every "AI" now means a language model - ours doesn't. Why the games run on minimax, expectimax, and BFS instead of an LLM, point by point, plus our measured numbers: a provably-optimal tic-tac-toe move in 0.3 ms, on-device, with zero network calls and 0 l

Using one transparent model we computed the cost to charge 10 popular EVs at home, on public Level 2, and on DC fast chargers - per full charge and per mile. Home charging runs about 5-6 cents a mile; DC fast can meet or top a 30-mpg gas car at roughly 2.

A live experiment, currently gathering data: stop a stopwatch at exactly 10.00 seconds and your anonymized attempt joins a public dataset. Add a data point and watch the error distribution grow.

Converting a PDF to Word transfers the text, not the layout. What carries over, what is lost, why scanned PDFs need OCR, and when to use Word's own import.

Downsampling embedded images vs. rasterizing pages, why rasterizing removes selectable text, and why a small or text-only PDF may not shrink - or can grow.