Which of the following list of numbers is/are an Arithmetic Progression?
(A) 6, 12, 18, 24...
(B) 1, 3, 5, 7...
(C) −3, 3, −3, 3...
(D) 21, 18, 15...
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A), (B) and (D) only
A list is an arithmetic progression when the difference between consecutive terms is always the same. In (A) it is +6, in (B) +2 and in (D) −3.
In (C) the differences run +6, −6, +6..., which are not equal, so −3, 3, −3, 3... is not an AP.