## Mathematical Excursions: Side Trips Along Paths Not Generally Traveled in Elementary Courses in Mathematics |

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added adjacent sides Algebra angle answer arithmetical progression arranged bers called CHAPTER column construction cube cyclic order decimal places denominator diagonal divided by 9 divisible by 11 drawing a straight drawn easy equal exactly example factor figure Find a square find the sum following numbers formula four digits fourth order fraction Geometry given number gives hypotenuse inch instance integers integral values length Lewis Carroll magic square mathematicians Mathematics means measure method multiply nine digits notice number is divisible number of digits number of terms opposite order original number perfect number Perhaps period perpendicular possible prime number problem proof prove puzzle quadratic residues quotient rectangle repeating decimal result rhombus right triangle rule saucer sets of numbers solution solved square root straight line subtracting Suppose Take theorem thing three digits three numbers triangular number true twin primes units weight write zero