`1348,1338,1318,1288,1248,?`

Options

A. 1188
B. 1198
C. 1178
D. 1208

Answer

To find the next number in the series: `1348, 1338, 1318, 1288, 1248, ?`, we will analyze the differences between consecutive numbers.

### Step-by-Step Solution:

1. **Identify the first number in the series:**
- The first number is **1348**.

2. **Find the difference between the first and second numbers:**
- \( 1348 - 1338 = 10 \)
- The difference is **10**.

3. **Find the difference between the second and third numbers:**
- \( 1338 - 1318 = 20 \)
- The difference is **20**.

4. **Find the difference between the third and fourth numbers:**
- \( 1318 - 1288 = 30 \)
- The difference is **30**.

5. **Find the difference between the fourth and fifth numbers:**
- \( 1288 - 1248 = 40 \)
- The difference is **40**.

6. **Identify the pattern in the differences:**
- The differences are: **10, 20, 30, 40**.
- We can see that the differences are increasing by **10** each time.

7. **Calculate the next difference:**
- Following the pattern, the next difference should be **50**.

8. **Subtract the next difference from the last number in the series:**
- \( 1248 - 50 = 1198 \)

9. **Conclusion:**
- The next number in the series is **1198**.

### Final Answer:
The next number in the series is **1198**.

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