Proof+250 XP
Paper Parachute Test
Make parachutes of different sizes from paper or plastic bags and time their drops. Post a short write-up.
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Science · Facts & stats · iChallenge network
The Drag Challenge
Daily facts and stats about aerodynamic drag, air resistance and speed, plus real challenges to put them to work.
Today's 3 challenges
A falling object reaches terminal velocity when what happens?
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Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #22Resets 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
Paper Airplane Drag Lab
Fold three paper airplane designs and measure how far each flies. Post a short write-up.
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Streak · 7 days+185 XP
7-Day Physics Fact Streak
Learn one fact about forces and motion each day. Check in once a day.
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By the numbers
Live counts from DragChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days93
Leaderboard
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Badges
Earned on any arena, shown on your profile everywhere.
First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
FinisherComplete a challenge.
RecruiterInvite a friend who finishes a round.
CaptainInvite 5 friends who finish a round.
PodiumFinish a day in an arena's top 3.
ChallengerReach level 10.
Profile SavedSave your progress with an email.
Save your progress
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Put a prize on a challenge
Fund a prize on DragChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
- Pick the challenge and the prize
- We review entries before a funded prize is awarded
- You get finisher and engagement numbers after it closes
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Questions
Do I keep rights to my work?
Yes — you own everything you create. Posting a score never transfers rights.
How are creative challenges scored?
Completion and streaks score points; community votes add bonus.
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.