Number of the Week

The number of Guardian newspaper readers (29,000) who took up the challenge to "Investigate your MP's expenses."

The percent of employees (30%) who argue with someone at work at least once a month.

The average percent (8%) of incorrect ball-strike calls made by Major League Baseball umpires.

The percent of work tasks (63%) that are interrupted when employees work in openly landscaped offices.

The percent of online ads (54%) that are never seen by anyone.