721, 618, 515, 412, 309, ….

Options

A. 106
B. 216
C. 206
D. 139

Explanation

To find the next term in the series 721, 618, 515, 412, 309, we can start by examining the differences between consecutive terms.

1. **Calculate the differences:**
- 721 - 618 = 103
- 618 - 515 = 103
- 515 - 412 = 103
- 412 - 309 = 103

So, the differences between consecutive terms are all equal to 103.

2. **Identify the pattern:**
The pattern shows that each term is decreasing by 103.

3. **Find the next term:**
To find the next term, we subtract 103 from the last term (309):
- 309 - 103 = 206

Thus, the next term in the series is **206**.