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Equation Unknowns
Critical Thinking Puzzles


Equation Unknowns Book - All of the Puzzles!
     One page of each puzzle (38 total pages)


Very Easy
Look at the greater and less than clues. One of the values will be obvious.
   addition; 2 shapes
subtraction; 2 shapes
addition or subtraction; 2 shapes

One page of each puzzle


Easy - 2 Shapes
   2 shapes; numbers 0 to 10; addition
2 shapes; numbers 0 to 10; subtraction
2 shapes; numbers 0 to 10; addition and subtraction
2 shapes; numbers 0 to 10; multiplication
2 shapes; numbers 0 to 10; division

One page of each puzzle


3 Shapes - Includes 1 Redundant Rule
   3 shapes; numbers 0 to 10; 1 redundant rule; addition
3 shapes; numbers 0 to 10; 1 redundant rule; subtraction
3 shapes; numbers 0 to 10; 1 redundant rule; addition and subtraction
3 shapes; numbers 0 to 10; 1 redundant rule; multiplication
3 shapes; numbers 0 to 10; 1 redundant rule; division

One page of each puzzle


More Difficult: Addition and Subtraction
   3 shapes; numbers 0 to 20; addition and subtraction
4 shapes; numbers 0 to 20; addition and subtraction
5 shapes; numbers 0 to 20; addition and subtraction

One page of each puzzle


Mix
   3 shapes; numbers 0 to 50 (no division)
3 shapes; numbers 0 to 50 (division included)
4 shapes; numbers 0 to 50 (no division)
4 shapes; numbers 0 to 50 (division included)
5 shapes; numbers 0 to 50
3 shapes; numbers 0 to 100
4 shapes; numbers 0 to 100

One page of each puzzle


Equations with Three Unknowns
   no parenthesis (3 shapes)
no parenthesis (4 shapes)
includes parenthesis (3 shapes)
includes parenthesis (4 shapes)

One page of each puzzle


Equations with Three Unknowns; Larger Numbers (2 redundant rules to make easier to solve)
   3 shapes
4 shapes

One page of each puzzle


Negative Numbers
   2 shapes; addition
2 shapes; subtraction
2 shapes; multiplication
2 shapes; division
3 shapes; addition
3 shapes; subtraction
3 shapes; multiplication
3 shapes; division
3 shapes; mix of operations

One page of each puzzle


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