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Chemical calculations with balancing and molar-mass tools

Online coding assessment platform for AI and ML engineering roles

AI agents that automate browser workflows on any website.

Cloud browsers and web data APIs for AI agents and data teams

Stealth AI coding assistant for LeetCode and technical interviews

Optimization modelling languages connected to Excel data

Inspect, solve and stack astronomical images

AI interview copilot for coding, system design and behavioral rounds

A focused math solver with examples and reference links

Math input with worked examples across several subjects

AI math solver and tutor with step-by-step answers, PDF homework help, and study tools.

Community coding kata with tests and solution comparisons

Mathematical and scientific calculators with practical forms

Mathematical problem solving with displayed working

An annual collection of language-independent programming puzzles

Coding-interview study organized around reusable patterns

Design-thinking courses with cohort and on-demand options.

Coding practice grouped by technical skill

A contest community with a reusable programming problemset

Algorithm exercises grouped into a structured problem set

Programming rounds and practice problems in one hub