Spotting the rule

Exercise and reference answers

Questions

1. Question

   2, 6, 18, 54 — each term is the previous one

   Choices

   1. times 3
   2. plus 4
   3. squared

   Correct choice

   times 3

2. Question

   That makes it a

   Choices

   1. arithmetic progression
   2. geometric progression
   3. random list

   Correct choice

   geometric progression

3. Question

   Its common ratio is

   Choices

   1. 4
   2. 2
   3. 3

   Correct choice

   3

4. Question

   The next term after 54 is

   Choices

   1. 162
   2. 108
   3. 58

   Correct choice

   162

Explanation