Each month a new Open Math Challenge will be hosted!

Candidates worldwide aim to score as high as possible on the 5-minute mental math test. You can take multiple attempts:

• Your highest score counts
• The average score serves as a tie-break

Navigate to the Lobby to give it a go at this month's challenge!

Each month there will be giveaways for the top scorer(s). Check the notification at the top of the monthly challenge lobby for the details.