Streak · 7 days+185 XP
7-Day Vector Practice Streak
Solve one short vector problem each day, like adding two arrows on graph paper. Check in once a day.
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Science · Facts & stats · iChallenge network
The Vector Challenge
Daily facts and stats about vectors, plus real challenges to put them to work.
Warm-up questionNot ranked · tap an answer
What is the magnitude of the vector (3, 4)?
By Pythagoras, the length is the square root of 3² + 4², which is 5.
Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #2Resets 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
Draw a Vector Logo
Design a simple logo from basic shapes in a free vector drawing tool and post a link or short write-up.
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Streak · 10 days+200 XP
10-Day Direction Walk Streak
On a daily walk, estimate the distance and compass direction of your route as a vector. Check in daily.
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Proof+250 XP
Treasure Map in Vectors
Draw a treasure map with directions written as vectors, like 3 steps east and 4 north, and post a link or write-up.
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By the numbers
Live counts from VectorChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days28
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 VectorChallenge.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
What languages count?
Any language. Challenges score consistency and completion, not syntax.
Is this for beginners?
Yes — quiz rounds start easy and scale with your streak.
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.