expert Set 39 Logic Puzzle

Expert Sequence Pattern #39

Title
Expert Sequence Pattern #39
SequenceType
seq-mixed
DisplaySequence
  • 9
  • 12
  • _
  • _
  • _
  • 16
  • 21
  • _
  • 25
  • 20
FullSequence
  • 9
  • 12
  • 13
  • 14
  • 17
  • 16
  • 21
  • 18
  • 25
  • 20
BlankPositions
  • 2
  • 3
  • 4
  • 7
Answers
  • 13
  • 14
  • 17
  • 18
Rule
Two interleaved arithmetic sequences
Question
Find the 4 missing terms in the sequence: 9, 12, _, _, _, 16, 21, _, 25, 20
SequenceLength
10
Hint
Look at every other term separately.