What will come in place of question mark(?) in given number series.
0.5 2 4.5 8 12.5 ?

Options

A. 15
B. 16
C. 17
D. 18

Answer

To solve the number series: 0.5, 2, 4.5, 8, 12.5, ?, we need to identify the pattern in the series.

### Step-by-Step Solution:

1. **Identify the Series**: The given series is 0.5, 2, 4.5, 8, 12.5, ?.

2. **Calculate Differences**: Let's find the difference between consecutive terms:
- 2 - 0.5 = 1.5
- 4.5 - 2 = 2.5
- 8 - 4.5 = 3.5
- 12.5 - 8 = 4.5

So, the differences are: 1.5, 2.5, 3.5, 4.5.

3. **Identify the Pattern in Differences**: The differences themselves are increasing by 1:
- 2.5 - 1.5 = 1
- 3.5 - 2.5 = 1
- 4.5 - 3.5 = 1

4. **Predict the Next Difference**: Following the pattern, the next difference should be:
- 4.5 + 1 = 5.5

5. **Add the Next Difference to the Last Term**: Now, add this difference to the last term in the series:
- 12.5 + 5.5 = 18

6. **Conclusion**: Therefore, the missing term in the series is 18.

### Final Answer:
The value that comes in place of the question mark (?) is **18**.