hard Set 38 Logic Puzzle

Hard Sequence Pattern #38

Title
Hard Sequence Pattern #38
SequenceType
seq-arithmetic
DisplaySequence
  • 15
  • _
  • 27
  • 33
  • _
  • 45
  • 51
  • _
  • 63
  • 69
FullSequence
  • 15
  • 21
  • 27
  • 33
  • 39
  • 45
  • 51
  • 57
  • 63
  • 69
BlankPositions
  • 1
  • 4
  • 7
Answers
  • 21
  • 39
  • 57
Rule
Add 6 each time (start at 15)
Question
Find the 3 missing terms in the sequence: 15, _, 27, 33, _, 45, 51, _, 63, 69
SequenceLength
10
Hint
Look at the difference between each consecutive pair.