hard Set 58 Logic Puzzle

Hard Sequence Pattern #58

Title
Hard Sequence Pattern #58
SequenceType
seq-mixed
DisplaySequence
  • 7
  • _
  • 9
  • 14
  • _
  • 16
  • 13
  • _
  • 15
  • 20
FullSequence
  • 7
  • 12
  • 9
  • 14
  • 11
  • 16
  • 13
  • 18
  • 15
  • 20
BlankPositions
  • 1
  • 4
  • 7
Answers
  • 12
  • 11
  • 18
Rule
Two interleaved arithmetic sequences
Question
Find the 3 missing terms in the sequence: 7, _, 9, 14, _, 16, 13, _, 15, 20
SequenceLength
10
Hint
Look at every other term separately.