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Sort each statement as a Necessary or Sufficient condition for 'X is a square'.

Exercise and reference answers

Left
Necessary
Items
  1. Item
    X is a quadrilateral
    Answer
    Necessary
  2. Item
    X has 4 right angles
    Answer
    Necessary
  3. Item
    X has 4 equal sides
    Answer
    Necessary
  4. Item
    X is a rhombus with a right angle
    Answer
    Sufficient
  5. Item
    X is a rectangle with equal sides
    Answer
    Sufficient
  6. Item
    X is a regular polygon of 4 sides
    Answer
    Sufficient
Right
Sufficient
Instructions
For X to be a square…

Explanation

_Source: CAT LR Logic — Stephen Read 'Thinking About Logic'_
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