medium Set 81 Logic Puzzle

Medium Sequence Pattern #81

Title
Medium Sequence Pattern #81
SequenceType
seq-mixed
DisplaySequence
  • 5
  • 15
  • 10
  • _
  • _
  • 19
  • 20
  • 21
FullSequence
  • 5
  • 15
  • 10
  • 17
  • 15
  • 19
  • 20
  • 21
BlankPositions
  • 3
  • 4
Answers
  • 17
  • 15
Rule
Two interleaved arithmetic sequences
Question
Find the 2 missing terms in the sequence: 5, 15, 10, _, _, 19, 20, 21
SequenceLength
8
Hint
Look at every other term separately.