Daily Math Challenge

Sharpen your math skills with a new problem every Tuesday to Friday. These daily challenges are perfect for those who enjoy quick, engaging puzzles.

Problem 1080

Posted: February 1, 2024

Quick one

Determine the missing value (?) in the following list of numbers.

1, 3, 6, 12, 4, 7, 8, 15, 6, ?, 14, 17, 9, 15, 18, 20

The first 5 to correctly answer this question are shown below.

View All Individual Rankings

The 5 top-ranked leaderboards for this question are shown below.

View All Leaderboard Rankings