Question 1
What is the next term in this alternating sequence: 5, 5, 7, 9, 9, 13, 11, 17, ?
Two interleaved sequences:
- Sequence A: 5, 7, 9, 11 (add 2 each time)
- Sequence B: 5, 9, 13, 17 (add 4 each time)
Next term is from Sequence B: 21
- Sequence A: 5, 7, 9, 11 (add 2 each time)
- Sequence B: 5, 9, 13, 17 (add 4 each time)
Next term is from Sequence B: 21