expert Set 6 Logic Puzzle

Expert Sequence Pattern #6

Title
Expert Sequence Pattern #6
SequenceType
seq-mixed
DisplaySequence
  • 3
  • 18
  • 6
  • 21
  • _
  • _
  • _
  • 27
  • _
  • 30
FullSequence
  • 3
  • 18
  • 6
  • 21
  • 9
  • 24
  • 12
  • 27
  • 15
  • 30
BlankPositions
  • 4
  • 5
  • 6
  • 8
Answers
  • 9
  • 24
  • 12
  • 15
Rule
Two interleaved arithmetic sequences
Question
Find the 4 missing terms in the sequence: 3, 18, 6, 21, _, _, _, 27, _, 30
SequenceLength
10
Hint
Look at every other term separately.