expert Set 69 Logic Puzzle

Expert Sequence Pattern #69

Title
Expert Sequence Pattern #69
SequenceType
seq-mixed
DisplaySequence
  • 9
  • 13
  • _
  • 17
  • _
  • 21
  • _
  • _
  • 25
  • 29
FullSequence
  • 9
  • 13
  • 13
  • 17
  • 17
  • 21
  • 21
  • 25
  • 25
  • 29
BlankPositions
  • 2
  • 4
  • 6
  • 7
Answers
  • 13
  • 17
  • 21
  • 25
Rule
Two interleaved arithmetic sequences
Question
Find the 4 missing terms in the sequence: 9, 13, _, 17, _, 21, _, _, 25, 29
SequenceLength
10
Hint
Look at every other term separately.