Streak · 7 days+185 XP
7-Day F-Word Vocabulary Streak
Learn one new English word starting with F each day and use it in a sentence. Check in once a day.
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Language · Facts & stats · iChallenge network
The F Challenge
Daily facts and stats about the letter f in science, music and everyday symbols, plus real challenges to put them to work.
Today's 3 challenges
At sea level, water freezes at what temperature in Fahrenheit?
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Streak0days
LeagueBronzeweekly
Daily #32Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Proof+250 XP
F Around the House
Find five things at home labeled with an F, such as a thermostat in Fahrenheit, and post a short write-up.
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Streak · 10 days+200 XP
Fahrenheit to Celsius Drill
Convert one Fahrenheit temperature to Celsius by hand each day. Check in once a day.
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By the numbers
Live counts from FChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days65
Challenge joins9
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In the ArenaJoin your first challenge.
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Questions
How do I start?
Play today's quiz round, post your score, and start a streak.
What do I earn?
XP, levels, streaks and badges. Save your progress with an email and it follows you to every arena on the iChallenge network.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.