hard Set 89 Logic Puzzle

Hard Sequence Pattern #89

Title
Hard Sequence Pattern #89
SequenceType
seq-matrix
DisplaySequence
  • 3
  • _
  • 7
  • 9
  • _
  • 13
  • 15
  • _
  • 19
  • 21
FullSequence
  • 3
  • 5
  • 7
  • 9
  • 11
  • 13
  • 15
  • 17
  • 19
  • 21
BlankPositions
  • 1
  • 4
  • 7
Answers
  • 5
  • 11
  • 17
Rule
Each term = 2n + 1
Question
Find the 3 missing terms in the sequence: 3, _, 7, 9, _, 13, 15, _, 19, 21
SequenceLength
10
Hint
Find the linear formula: multiply position by a constant and add another.