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number theory

About Levels
of Difficulty
Primary
numeration
operations with numbers
number theory
algebraic thinking
geometry
measurement
data analysis
logical reasoning
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Primary
Problems
Primary
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Number Theory
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These problems delve into some basic properties of numbers, including odds/evens and factors/multiples.
- Related Resources
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Interactive resources from our Math Tools project:

Math 1: Number Sense
NCTM Standards:

Number and Operations Standard for Grades Pre-K-3
Access to these problems requires a Membership.
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Counting Shells
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Grade 2. Use the clues to figure out how many shells Jack has.
... more>>
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Donuts on a Tray
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Grade 2. Help Glenda to figure out how to arrange snacks on a tray in equal
rows.
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Laying Carpet
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Grade 2. Figure out the different sizes that LeBron�s rectangular room might
be.
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Making Sandwiches
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Grade 1. Help Ricardo and Gloria divide their task as fairly as possible.
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