THE LEADERBOARD
Accuracy. And speed.
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Most correct answers first; tied scores use the shortest time. Weekly scores and times are added. Exact ties share a rank.
Rules, fair play and PISA reference
Three original mathematics, reading and science questions inspired by public PISA frameworks. This is not an official test, does not measure your PISA proficiency and cannot compare your score with countries.
One daily game per browser; publication is limited to one per LinkedIn account. Daily questions are shared, with shuffled answer options. Time is recorded on the server, includes connection time and does not pause when switching tabs. At 120 seconds, submitted correct answers are retained. Absence of outside help cannot be guaranteed.
Public ranking is opt-in and for adults aged 18 or older. We store a necessary cookie for 30 days and results accessible for 90 days. LinkedIn provides an identifier and name; we do not request email, contacts or permission to post on your account. You can leave the ranking and disable your links from the result screen. Controller: Luis Manuel Tolmos.
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