Question

In the Arithmetic Progressive series 7, 13, 19, _______, what will be the 19^_th term?
1. 125
2. 120
3. 115
4. 110

Answer 1

Correct Answer - Option 3 : 115

Given:

7, 13, 19, ..............., 19th term

Concept used:

Tn = a + (n – 1)d where (Tn = nth term, a = 1st term d = common difference)

Calculation:

Common difference = 6

Tn = a + (n – 1)d

⇒ T19 = 7 + (19 – 1)6

⇒ T19 = 7 + 18 × 6

⇒ T19 = 7 + 108

⇒ T19 = 115

19th is 115

∴ 19th term will be 115