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sin (x/2) cos (x/2) = (1/2) sin x
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Sin or Cos 3x, 4x, etc.
Sin or Cos 3x, 4x, etc.
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4 Squares in Sequence, pg 2
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Sum of SQRTs
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Find the City
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Scrambled Quote
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Do They Add Up?
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Treasure Hunt
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Question 01
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Question 02
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Question 03
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Question 04
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Question 05
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Question 06
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Question 07
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Question 08
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Question 09
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Question 10
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Question 11
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Question 12
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Question 13
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Question 14
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15: Pontiff Locations
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Question 16
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Question 17
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Question 18
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19: Tower of Hanoi
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Question 20
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Circles Puzzle 1
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Circles Puzzle 2
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Circles Puzzle 3
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Cube and Circles Puzzle
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Two Circles and a Sphere
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Triangle & 3 Circles
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Reciprocal Polynomial
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Prime Arithmetic Sequence
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Integration Recurrence
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Tetromino Soup
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A large product
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How Many Solutions?
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Trig is Fun!
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Set Sums
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A Set of Rational Numbers
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Counting
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Reconstruct the Numbers
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Triangle Area
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Card Trick
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Fractal Function
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I'm Thinking of a Number
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Polynomial Madness
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Buckets and Springs
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Really, Really Big Numbers
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Prime Number Puzzles
A Two Player Game
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A Two-Player Game
Sums of Consecutive Integers
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Rectangle and Quadrilateral Puzzle
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Fermat Pseudoprime Puzzle
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Friendly Sets Puzzle
Collapse 10891089
1089
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Powers of 3 and Powers of 2
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Handshakes Puzzle
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Domino Tiling Puzzle
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Semi-Periodic Sequence Puzzle
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Guess the Numbers Puzzle
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Recurrence Relation Puzzle 1
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Squares & Fourths Puzzle
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Holey Sphere Puzzle
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Triangle Partition Puzzle
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Increasing Function 1
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Nondecreasing Integer Sequence Two
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Increasing Function B
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Integer Function
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Locker Puzzle
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Freeway Puzzle
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Mirrors and Light Puzzle
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Square Inscribed in Sector
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Rooks Puzzle
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Sum of Series
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Pirate Puzzle
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Cut the carpet
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Sides of Square Tiling Answer
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Prove Composite Answer
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Arithmetic Sequences of Perfect Squares
Arithmetic Sequences of Perfect Squares
Arithmetic Sequences of Perfect Squares
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The webmaster and author of this Math Help site is Graeme McRae.