In the series 547, 568, 589, ....... what will be the 15th number?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 841.
AP = Tn = a + (n - 1) d
Common difference (d) = 21
First term (a) = 547
Thus 15th term in this series ⇒ T15 = 547 + (15 - 1) × 21
= 547 + (14) × 21
= 547 + 294
= 841