How many hours are in one week?
Answer168
There are 24 hours in a day, and 24 × 7 = 168.
Challenge · Facts & stats
Challenge facts & stats
7 fact-checked facts about challenges, goals and habits, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
How many days are in a leap year?
Answer366
A leap year adds 29 February, giving 366 days.
Going deeper
In the classic Pomodoro Technique, how long is each focused work session?
Answer25 minutes
The technique uses 25-minute focused sessions separated by short breaks.
The Japanese term 'kaizen' refers to what idea?
AnswerContinuous improvement in small steps
Kaizen, meaning 'change for the better', describes steady, continuous improvement.
What is spaced repetition?
AnswerReviewing material at gradually increasing intervals
Spaced repetition schedules reviews further apart as you remember something better.
Expert level
The 'marshmallow test' studies of the 1960s and 70s examined what ability in children?
AnswerDelaying gratification
Children could eat one treat now or wait and get two, testing their ability to delay gratification.
The popular 10,000-steps-a-day goal is traced to a 1960s pedometer sold in which country?
AnswerJapan
A Japanese pedometer called 'manpo-kei', meaning '10,000-step meter', popularized the figure.
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