Extrapolating a sequence

12 questions

1. Which of these are triangular numbers?
2. Which of these are prime numbers?
3. 7, 8, 15, 23, 38 ... are the first five terms of a sequence. Which of these could be a rule for the sequence?
4. A linear sequence starts -4, 6, ... . The next term is ___.
5. A geometric sequence starts -4, 6, ... . What is the next term?
6. Which of these could be the first 5 terms in a sequence with a common second difference?
7. Which of these could be a rule for generating the sequence 8, 16, 32, ...?
8. Izzy says the next term in the sequence 1, 3, 6, 10, ... must be 15. Why is she incorrect?
9. Which of these could be a rule for the sequence: 37, 41, 43, 47, 53, ...?
10. Which of these could be the rule for the sequence starting 17, 19, 20, ...?
11. Which of these could be the rule for the sequence starting 6, 7, 9, ...?
12. Match each sequence which start with the terms 3, 6, ... to the correct rule.

License: OGL