Easy data structure and algorithm practice puzzle.
Given a force in newtons and an area in square meters, return the stress in pascals, rounded to 2 decimals. Divide force by area. One pascal is literally one newton per square meter, so checking the units tells you the formula is right before you test anything.
Solve it three ways: snap the jigsaw pieces together, fill in the blanks, or type it from scratch against the tests. This one is free.
Every line of the solution comes with a note explaining why it is there, and a step by step replay shows the code running. At level 3, where you type it yourself, you can ask for an AI mock interview on this problem that ends with a hiring manager's scorecard.
Then grow it into a real project with the Software Engineer button: this puzzle becomes the Event Stats Roll-up, a pipeline you can run and download. See every Software Engineer project.
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