List of Puzzlets in Numerical Order

To access individual Puzzlets, follow the Archives link.

Number | Title |

1 | An Easy Starter! |

2 | Make 100 From A PanDigital |

3 | PanDigital Fractions |

4 | Palindromic Squares |

5 | A Cubic Equation |

6 | Cheque Out This Error! |

7 | Sum The Cubes of an Integer's Digits |

8 | Triple Of Numbers |

9 | Sum of the Factorials of an Integer's Digits |

10 | PanDigitals Made from Squares |

11 | A Cylinder and a Sphere |

12 | Ordered Primes from Composites |

13 | Pounds, Shillings, and Pence |

14 | Triplets of 2-digit Integers |

15 | A Triplet of Sums of Squares |

16 | Multiples of Numbers from Powers of their Digits |

17 | Combining Weights |

18 | Volume of a Tank |

19 | Prime Number Intervals |

20 | Counting the Days |

21 | An Upside-Down PanDigital! |

22 | Sharing the Gold Coins ... |

23 | Integer Products by Digit Rotation |

24 | Triplets of Integers Summing to a Square |

25 | Fractions - a New Method |

26 | Palindromic Odometer Readings |

27 | Integer Division |

28 | Right-Angled Triangles |

29 | Squared Denary and Binary Palindromes |

30 | Coin Combinations |

31 | Products and Reversed Sums |

32 | Temperatures in ºC and ºF |

33 | Digits and Powers |

34 | A Pandigital Equation |

35 | Division and Remainder |

36 | Primes and Cubes |

37 | A 10-digit Pandigital from 3rd/4th Powers |

38 | Factorial Sums |

39 | Equal Products and Sums |

40 | A Family's Ages |

41 | Digital Products |

42 | Pandigital Groups |

43 | More Right-Angled Triangles |

44 | Sums of Squares |

45 | Squares and Cubes |

46 | One Million |

47 | Five Weights |

48 | Manipulating Primes |

49 | Palindromes and Squares |

50 | Cubic Suffixes |

51 | A Trapezium |

52 | Palindromes from Squares |

53 | Six-Palindromic Odd Numbers |

54 | Empty Bottles |

55 | Squares with Consecutive Parts |

56 | Proper Divisors |

57 | Integer Reversals |

58 | Reversals and Anagrams |

59 | Denary and Binary Palindromes |

60 | Fourth Powers |

61 | Prime Fibonacci Numbers |

62 | A Scalene Triangle |

63 | A Diophantine Equation |

64 | Another Right-Angled Triangle |

65 | Repeated Digit Product |

66 | The Kaprekar Process |

67 | A Return Car Journey |

68 | How long to fill the Tank? |

69 | Measuring a Cube |

70 | A Rectangle and a Square |

71 | A Quadratic Discriminator |

72 | Triangular Numbers |

73 | Anagrammatic Products & 31 |

74 | A run from two squares |

75 | How Many Ones? |

76 | Two Triangles |

77 | Making Primes from Primes |

78 | UniDigits from Products |

79 | My House Number |

80 | A Million in Cubes |

81 | A Folded Box |

82 | A Pandigitally Logarithmic Equation |

83 | Sums of cubes |

84 | Anagrammatic Products |

85 | Triangular Numbers Revisited |

86 | Dimensions of a Box |

87 | A Matrix of Triangular Numbers |

88 | Making One Thousand |

89 | Arithmetic Progressions and Palindromes |

90 | Primes Both Ways |

91 | Denary and HexaDecimal Palindromes |

92 | Anagrams and Factors |

93 | The Triangle Revisited |

94 | UniDigits from Squared Triples |

95 | PrimeRuns |

96 | Palindromic Waves |

97 | Circle in a Triangle |

98 | Derived UniDigit Numbers |

99 | Divisible Chains |

100 | Palindromes from Division |

101 | Numerical Reversals |

102 | Related Ages |

103 | Another Scalene Triangle |

104 | Sum to 10,000 |

105 | Flexible Fractions |

106 | Selective Deletions |

107 | Even Digit-Count Palindromic Squares |

108 | A Sequence of Summed Cubes |

109 | Concatenated Digits |

110 | Repeated Digit Sums and 15 |

111 | Squares from Squares |

112 | A Truncated Triangle |

113 | Self-Generated Integer Products |

114 | Proper Divisor Strings |

115 | Self-Generating Integer Factors |

116 | Embedded Repeated Digits |

117 | Self-Generating Squares |

118 | Twenty Bricks |

119 | Three Squares |

120 | Squares from Twin Primes |

121 | Dartboard Scores |

122 | A Run from a Product |

123 | Square Pandigitals |

124 | An Equation with Digits |

125 | A Self-Generating Integer from Digit Cubes |

126 | Matrix Products |

127 | Playing Card Scores |

128 | A Palindrome from Adjacent Squares |

129 | Un-Prefixable Primes |

130 | A Square from Two UniDigits |

131 | Primes of Type 4n - 1 |

132 | Self-Generating Integer from Digit Powers |

133 | Primes from Prime Digits |

134 | A Square from an Integer and its Reverse |

135 | Numbers formed from Powers of their own Digits |

136 | Consecutive Integer Anagrams |

137 | A Reverse Run from Squares |

138 | All-Even-Digit Squares |

139 | Palindromes from Twin Primes |

140 | A Square from two Runs |

141 | A 10-digit Pandigital from 2nd/3rd Powers |

142 | Summing Decimal Digits |

143 | A Self-Generating Sequence |

144 | A Reversed Product |

145 | Self-Generating Sequences Revisited |

146 | More on Triangular Numbers |

147 | Denary Integer Reversal in A Lower Base |

148 | The Index and Length of Factorials |

149 | Squares from Concatenated Squares |

150 | Digit Permutation Sums |

151 | Sub-Number Primes |

152 | Mutually-Exclusive Squares and Cubes |

153 | Squares from Rotated Squares |

154 | 3-Digit Integer Reversal for any Base Change |

155 | Four Consecutive Integers |

156 | A 3-Digit Formula |

157 | Pandigitals from Squared Pandigital Parts |

158 | Primes from Prime Digit Permutations |

159 | Triangular Numbers from Triplet Products |

160 | Counting the Months |

161 | Squares from Reversed Primes |

162 | Squares with Embedded Roots |

163 | The Difference of Two Squares |

164 | Squares and Half-Squares |

165 | Digit Factorials Revisited |

166 | Prime Factor Sum |

167 | Order Digits |

168 | An Integer's Digits Cubed Revisited |

169 | A Sequence of Integer Digit Sums |

170 | Integer Products Again |

171 | Primes from Prime Digit Rotations |

172 | A New Sequence |

173 | Age Reversals |

174 | A Sequence from Odd, Even & Prime Numbers |

175 | Digital Clock Segments |

176 | A Control Panel Problem |

177 | Temperatures Revisited |

178 | Palindromes in Denary and Octal |

179 | Shared Prime Factor Sums |

180 | Generating Reverse Runs |

181 | Contiguous Digit Sums |

182 | Squares from Concatenated Prime Factors |

183 | A Primitive Right-Angled Triangle |

184 | A Series of DigiNums |

185 | A Prime with a Digit Pattern |

186 | A Run of Consecutive Composites |

187 | UniDigits Embedded In Factorials |

188 | Figurate Pentagonals |

189 | Morse Code & Palindromic Primes |

190 | Count the Days for Palindromic Primes |

191 | Contiguous Digit Sum Palindromes |

192 | UniDigits from 7-Segment Displays |

193 | A Repeating Series from a PanDigital |

194 | A Cross of Steel |

195 | Hexadecimal Product Anagrams |

196 | A Palindrome from Triangular Numbers |

197 | Sums of Powers in Alternate Number Bases |

198 | Counting 1's and 0's in Binary |

199 | A Sequence from Digit Sums & Products |

200 | The LSD of Prime Numbers |

201 | Squares of Sums of Digits |

202 | Make 1 from a Pandgital |

203 | Palindromes from Digit Sum Series |

204 | Prime Runs including Zero |

205 | Consecutive Integers with same Prime Factor Sum |

206 | Hexadecimal Spelling |

207 | Happy Numbers |

208 | dePolignac Numbers |

209 | Happy Numbers Revisited |

210 | Triplets with the same Final Digit Product |

211 | An Oddly Abundant Number |

212 | Lucky Numbers |

213 | Cubed Integers Equal Digit Sums |

214 | Self-Descriptive Numbers |

215 | A Square from Concatenated Squares |

216 | Consecutive Primes With Target Intervals |

217 | Prime Factor Sequence |

218 | Achilles Numbers |

219 | Composite to Prime Ratios |

220 | Ellis Numbers |

221 | Prime Factors |

222 | A Self-Terminating Sequence |

223 | Integer Triplets with a Difference! |

224 | Prosum Numbers |

225 | Factorial Primes |