12 questions. Choose one answer for each question. Take your time and use the feedback to improve.
Choose your route
Every answer is a choice.
Select one answer card, then choose Check my answer. Questions about lists offer complete sets to choose from.
After two incorrect attempts, study a specific hint or choose to see the solution. Solutions you study count separately.
Reasoning questions offer statements to choose from. You never need to type a mathematical answer or explanation.
MISSION COMPLETE
Your thinking
made progress.
Your score uses the first checked answer in each question's latest attempt. Redo any question for a fresh scored attempt. A certificate needs more than 70% (at least 9 out of 12).
YOUR ACHIEVEMENT
Earn your Number Lab certificate
You have earned a certificate! Enter your name, then download your PDF.
Your name stays in this open tab. It is used only for your certificate.
Review, redo and improve
Review your selected answers and the explanations. Redo any question for a fresh attempt.