Run a timed email-verified quiz with n8n forms, SMTP and data tables

Quick overview This workflow runs an email-verified, timed quiz using n8n Forms, n8n Data Tables, and SMTP email sending, including resend limits, one-attempt-per-email enforcement, random question selection, automatic scoring, and saving results. How it works 1. Receives a quiz sign-up through an n8n Form with a name and email address. 2. Normalizes and validates the entry, checks n8n Data Tables to see if the email has already participated, and applies per-email and per-hour rate limits for verification codes. 3. If allowed, generates a 6-digit verification code, sends it via SMTP email, and logs only a SHA-256 hash of the code to the quizcodes n8n Data Table. 4. Prompts the participant to enter the emailed code in a second n8n Form and verifies it against the latest stored hash while enforcing code expiry and a maximum number of attempts. 5. When the code is valid, creates a participant record in the quizresults n8n Data Table and selects 10 random multiple-choice questions plus 1 feedback question from the quizquestions n8n Data Table. 6. Presents the timed quiz form, then scores submitted answers (or records a timeout/late submission), updates the participant’s result in n8n Data Tables, and shows the score completion page when applicable. Setup 1. Create an SMTP credential (for example Cloudflare Email Routing/Email Sending over SMTP) and update the sender details used to send the verification email. 2. Run the one-time manual setup path to create the quizcodes and quizresults n8n Data Tables. 3. Create and populate a quizquestions n8n Data Table with columns qid, type, difficulty, text, options, answer, and active, ensuring at least 10 active mcq questions (4 options separated by |) and at least 1 active text question. 4. Activate the workflow and share the public URL of the entry form so participants can start the sign-up process. Requirements - 1) Three data tables - quizquestions, quizcodes, quizresults created from the provided CSV files. 2. Claudeflare SMTP credential with Customization - Change the time limit and the difficulty mix in Pick Questions1. - Change the code expiry and resend limits in Check Request. - Edit the result messages in Score Answers1.