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 number theory
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Math Fundamentals
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Prime Numbers
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These problems provide practice with identifying prime numbers, and may also contain concepts of prime factorization and composite numbers.
- Related Resources
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Interactive resources from our Math Tools project:
Math 4: Number Theory
The closest match in our Ask Dr. Math archives:
FAQ: Prime Numbers
NCTM Standards:
Number and Operations Standard for Grades 3-5
Access to these problems requires a Membership.
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Birthday Probability
- Kristina Lasher & Lisa Lavelle
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Math Fundamentals, difficulty level 3. What is the likelihood that someone is born on an even or odd day of
the month? Are you more likely to be born on a prime number day or a
multiple of 3?
... more>>
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Cicada Circus
- Kristina Lasher and special thanks to John Cooley
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Math Fundamentals, difficulty level 2. Use the table of information about periodical cicadas to figure out when
the next time is that there will be three years in a row without an
emergence.
... more>>
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Five Digits of Fun
- Lisa Lavelle
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Math Fundamentals, difficulty level 4. Find a five-digit number based on these clues.
... more>>
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Four Playful Mathematicians
- inspired by Maria Fung's class at Western Oregon
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Math Fundamentals, difficulty level 2. Follow the clues to help the four playful mathematicians return the lost watch.
... more>>
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In Their Prime
- Claire Mead
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Math Fundamentals, difficulty level 2. Use the clues about multiples and primes to figure out how old
Jonathan and Hazel are.
... more>>
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Jellybean Fractions
- Lisa Lavelle
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Elementary, difficulty level 2. Determine good and bad choices in playing the Jellybean Fractions Game.
... more>>
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Summer Shoe Leftovers
- Teaching the Young Learner Group
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Math Fundamentals, difficulty level 4. Determine which of the leftover shoes might satisfy three shoppers' needs.
... more>>
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