How many days are in a leap year?
Answer366
A leap year adds February 29, giving 366 days.
Challenge · Facts & stats
iChallenges facts & stats
7 fact-checked facts about personal challenges, habit-building and everyday general knowledge, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which planet is closest to the Sun?
AnswerMercury
Mercury orbits closest to the Sun.
Going deeper
The 2014 Ice Bucket Challenge raised awareness for which disease?
AnswerALS
The viral challenge raised awareness and funds for ALS research.
How many squares are on a chessboard?
Answer64
A chessboard is an 8 by 8 grid.
A well-known 2009 UCL study found new habits took about how many days on average to become automatic?
Answer66
Participants averaged about 66 days, with a wide range.
Expert level
The Rubik's Cube was invented in which country?
AnswerHungary
Erno Rubik invented it in Hungary in 1974.
The classic Pomodoro Technique uses focus intervals of how many minutes?
Answer25
Each pomodoro is traditionally 25 minutes followed by a short break.
Know these cold?Today's round is five questions like these, 20 seconds each. Your streak and level follow you to every arena.Play today's round