Sharpen your math skills with a new problem every Tuesday to Friday. These daily challenges are perfect for those who enjoy quick, engaging puzzles.
You have 30 pieces of paper numbered 1 – 30 in a jar. You pick a piece of paper, replace it back in the jar and then pick a piece of paper again. What is the probability that each number picked is greater than 21 or less than 4?
The first 10 to correctly answer this question are shown below.
The 10 top-ranked leaderboards for this question are shown below.
View All Leaderboard Rankings