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Prime or composite?

Exercise and reference answers

Items
  1. Item
    2
    Category
    Prime
  2. Item
    11
    Category
    Prime
  3. Item
    23
    Category
    Prime
  4. Item
    4
    Category
    Composite
  5. Item
    253
    Category
    Composite
  6. Item
    1771
    Category
    Composite
Categories
  1. Item
    Prime
  2. Item
    Composite
Instructions
Tap a number, then tap what kind of number it is.

Explanation

_Source: syllabus Maths Ch1 Real Numbers, 1.2 The Fundamental Theorem of Arithmetic_
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