Mathematics - Number Theory - Divisibility and primes - The Sieve of Eratosthenes

Display a 10×10 grid of numbers 1-100. The student clicks '2' and all multiples of 2 get crossed out (colored red). Then clicks '3' - multiples of 3 crossed out (blue). Then 5, then 7. The remaining uncrossed numbers are PRIMES! Animate the crossing out. Count: 25 primes under 100. Ask: 'Do primes e

Edodovivmagarwal
Mathematics - Number Theory - Divisibility and primes - The Sieve of Eratosthenes
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Mathematics - Number Theory - Divisibility and primes - The Sieve of Eratosthenes

vivmagarwal
vivmagarwalJan 29, 2026

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Display a 10×10 grid of numbers 1-100. The student clicks '2' and all multiples of 2 get crossed out (colored red). Then clicks '3' - multiples of 3 crossed out (blue). Then 5, then 7. The remaining uncrossed numbers are PRIMES! Animate the crossing out. Count: 25 primes under 100. Ask: 'Do primes e

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MathematicsNumber TheoryClass 6, Class 6, Stage 7, Grade 6, MYP Grade 7

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