Target Exam

CUET

Subject

General Aptitude Test

Chapter

Quantitative Reasoning

Topic

Algebra

Question:

Find the 18th and nth term of the A.P. given by:

8, 13, 18, ...

Options:

$80, 3+5n$

$93, 3+5n$

$65, 3-2n$

$40, 5+3n$

Correct Answer:

$93, 3+5n$

Explanation:

Given A.P.:  8, 13, 18, ...

a= 8

d = 5

18th term = a + 17d = 8 + 17*5 = 93

nth term = a + (n-1)d = 8 + (n-1)*5 = 3 + 5n

The correct answer is Option (2) → $93, 3+5n$