hard Set 97 Logic Puzzle

Hard Sequence Pattern #97

Title
Hard Sequence Pattern #97
SequenceType
seq-numbers
DisplaySequence
  • 15
  • _
  • 39
  • 51
  • _
  • 75
  • 87
  • _
  • 111
  • 123
FullSequence
  • 15
  • 27
  • 39
  • 51
  • 63
  • 75
  • 87
  • 99
  • 111
  • 123
BlankPositions
  • 1
  • 4
  • 7
Answers
  • 27
  • 63
  • 99
Rule
Add 12 each time (start at 15)
Question
Find the 3 missing terms in the sequence: 15, _, 39, 51, _, 75, 87, _, 111, 123
SequenceLength
10
Hint
Look at the difference between each consecutive pair.