1 7 49 343 (?)

Options

A. 16807
B. 1227
C. 2058
D. 2401

Explanation

To find the missing number in the series 1, 7, 49, 343, we can observe the pattern in the series. Let's break it down step by step:

### Step-by-Step Solution:

1. **Identify the Pattern**:
- The series starts with 1, and each subsequent number seems to be obtained by multiplying the previous number by 7.

2. **Calculate the Next Number**:
- Start with the first number:
- \(1 \times 7 = 7\) (This confirms the second number)
- Next, take the second number:
- \(7 \times 7 = 49\) (This confirms the third number)
- Now, take the third number:
- \(49 \times 7 = 343\) (This confirms the fourth number)

3. **Find the Missing Number**:
- Now, to find the next number in the series, take the fourth number:
- \(343 \times 7 = 2401\)

4. **Conclusion**:
- Therefore, the missing number in the series is **2401**.

### Final Answer:
The missing number is **2401**.

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