How does a camera setting change the light in a photograph? How much yarn does a project need? How do you turn a rainfall reading into litres of water?
This collection brings together 30 focused quizzes and 300 questions on the calculations and ideas behind hobbies, crafts and everyday observations. There are 10 quizzes in English, 10 in German and 10 in Spanish. Questions, answers and explanations use the language of each quiz.
Each quiz contains 10 questions, all shown in a shuffled order. Choose one answer per question and aim for 8/10. Explanations on the results page show the reasoning, so a missed question becomes something you can work through.
In English: light, sound, maps and making
Explore exposure stops and telescope eyepieces, then work through knitting gauge, quilt seams and baker percentages. Other quizzes cover topographic maps, rhythm notation, PCM audio, dice probabilities and the linear dimensions of scale models.
- Photography Exposure Stops: Light and Equivalent Settings
- Knitting Gauge: Swatches, Stitch Counts and Repeats
- Topographic Maps: Contours, Scale and Gradient
- Baker Percentages: Flour Bases and Dough Arithmetic
- Telescope Eyepieces: Magnification and Exit Pupil
- Music Rhythm: Note Values, Dots and Simple Metre
- Quilting Maths: Seam Allowances and Block Layouts
- PCM Audio: Samples, Channels and File-Size Maths
- Board-Game Dice: Independent Rolls and Exact Probabilities
- Scale Models: Ratios, Units and Linear Dimensions
Auf Deutsch: planen, gestalten und rechnen
Wie viele Pixel braucht ein Fotodruck? Welche Strecke entspricht einer Kurbelumdrehung? Die deutschen Tests behandeln außerdem Aquarienvolumen, Pflanzraster, Stop-Motion, Papierfalten, Mosaike, Perlenmuster, Sonnenuhren und Rundenzeiten.
- Fotodruck: Pixel, ppi und Seitenverhältnisse
- Aquarien rechnen: Innenmaße und Wasserverdrängung
- Gartenplanung: Pflanzraster und Beetmaße
- Fahrradmechanik: Übersetzung und Entfaltung
- Stop-Motion: Bildrate, Laufzeit und Zeitraffer
- Papierfalten: Bruchteile und ideale Lagenzahlen
- Mosaikplanung: Steinchen, Fugen und Flächen
- Perlenmuster: Wiederholungen und Spiegelsymmetrie
- Sonnenuhr verstehen: Stundenwinkel im Modell
- Laufbahn rechnen: Runden und Zwischenzeiten
En español: medidas, materiales y observaciones
Practica con cuadernillos, proporciones de café, tiempos de subtítulos y punto de cruz. También encontrarás contracción cerámica, áreas y volúmenes de maquetas, registros de aves, mezclas por volumen, urdimbres y mediciones de lluvia.
- Encuadernación: hojas, páginas y cuadernillos
- Café de filtro: proporciones y masas
- Subtítulos: duración, desfase y velocidad de lectura
- Punto de cruz: cuadrícula, tela y medidas
- Cerámica: contracción lineal y dimensiones
- Maquetas: cómo escalan áreas y volúmenes
- Observación de aves: conteos y registros de campo
- Compostaje en números: volúmenes y mezclas
- Telar: urdimbre, densidad y longitud de hilo
- Pluviómetro: lluvia acumulada y unidades
Start with something you already enjoy
Pick a familiar hobby and try its quiz before reading the explanations. Pay attention to units, margins, repeated parts and the difference between a length, an area and a volume. The questions state their assumptions: a simplified calculation helps you understand a principle, while a real project may need measurements and allowances of its own.
These are focused practice exercises. The aquarium and compost quizzes cover arithmetic, and the running quiz covers distances and times; they do not prescribe animal care, compost recipes or training plans.