Question

Name the operation used to build the pattern in this sequence. 12,30,75,187.5,...

Answer 1

multiply by 2.5

Explanation:

note there is a common ratio between consecutive terms, that is

`(30)/(12)` =
`(75)/(30)` =
`(187.5)/(75)` = 2.5

then to build the sequence multiply the previous term by 2.5, that is

187.5 × 2.5 = 468.75 , etc

12, 30, 75, 187.5, 468.75, ...........