Question

If the common difference of an AP is 5, then what is a₁₈ – a₁₃?

Options

• 5

• 20

• 25

• 30

Answer 1

25

Explanation:

Given, the common difference of AP i.e., d = 5

Now,

As we know, n^th term of an AP is

a_n = a + (n – 1)d

Where a = first term

a_n is n^th term

d is the common difference

a₁₈ – a₁₃ = a + 17d – (a + 12d)

= 5d

= 5(5)

= 25