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№ 01 — This week’s feature
Other · Grades 4, 5, 6
He Picks First — How do you split something fairly?
The fairest way to share.
9 min11 questions
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Beginner
OtherGrades 4, 5, 6
Nine Votes — what is vote splitting?
11 questions · 8 min
Beginner
HistoryGrades 4, 5, 6
The Middle One — Why is there always a medium size?
11 questions · 9 min
Beginner
ScienceGrades 4, 5, 6
The Last Wolf
15 min
Beginner
MathematicsGrades 3, 4, 5
Who Moved the Cake? — How do detectives solve a mystery by ruling out what can't be true?
18 questions · 12 min
Beginner
OtherGrades 4, 5, 6
Nowhere to Shoot — Why do goalkeepers run out at strikers?
11 questions · 8 min
Beginner
MathematicsGrades 4, 5, 6
The Short Order — Why does serving the quickest first make everyone wait less?
26 questions · 15 min
Beginner
OtherGrades 4, 5, 6
Two Stickers — Is 50% off then 20% off really 70% off?
11 questions · 8 min
Beginner
ScienceGrades 4, 5, 6
One Stick — Why are triangles the strongest shape, and why do bridges and towers use them?
13 questions · 12 min
Intermediate
OtherAll levels
The Coin Kingdom
36 questions
AAdam Al-Masri
Intermediate
OtherAll levels
The 99% Test That's Usually Wrong
43 questions
AAdam Al-Masri5.0
Intermediate
ScienceGrades 6, 7, 8, 9
Two Ways to Be Fast
25 questions · 15 min
VViafocus
Beginner
GeographyGrades 4, 5, 6
Five Guineas — Why isn't the London Tube map to scale, and who designed it?
24 questions · 15 min
VViafocus
Beginner
ScienceGrades 4, 5, 6
The Last Wolf
15 min
VViafocus4.0
Intermediate
OtherGrades 6, 7, 8, 9
The Darkroom Test — How can you tell if a photo or video is AI-generated?
31 questions · 15 min
VViafocus
Intermediate
ScienceGrades 4, 5, 6
One More Tree
16 min
VViafocus5.0
Intermediate
OtherGrades 8, 9
The Receipt That Won't Stop — How does compound interest work, and what does spending really cost you?
32 questions · 14 min
VViafocus
Beginner
ScienceGrades 4, 5, 6
The Hungry Season — How does natural selection actually work?
21 questions · 13 min
VViafocus3.0
Beginner
MathematicsGrades 4, 5, 6
The Line on the Floor — How do you split something fairly? (I cut, you choose)
25 questions · 14 min
VViafocus
Beginner
HistoryGrades 4, 5, 6
The Ring of Names — How did we learn to read Egyptian hieroglyphs?
26 questions · 14 min
VViafocus3.0
Beginner
HistoryGrades 4, 5, 6
Tjugo kilo pengar — Vad är pengar egentligen, och vad är inflation?
27 questions · 14 min
VViafocus