# DBT JRF 2020 — Question 30

Exam: DBT JRF 2020 · Section: A · Topic: Aptitude & Reasoning · Difficulty: Easy

## Question

Find the next number in the series 23, 30, 38, 47, 57

## Options

- **A.** 69
- **B.** 68
- **C.** 67
- **D.** 65

## Answer

Option B

## Explanation

Differences between consecutive terms: $30-23=7$ , $38-30=8$ , $47-38=9$ , $57-47=10$ . The differences increase by 1 each time (arithmetic progression of differences). The next difference = $10+1=11$ . Therefore the next number = $57+11 = 68$ .

Source: https://mypyqbuddy.com/questions/find-the-next-number-in-the-series-23-6a05a8a02adafec470293204