`43923,3993,363,33,?`

Answer

To solve the number series `43923, 3993, 363, 33, ?`, we will analyze the pattern in the series step by step.

### Step 1: Identify the pattern
We start by examining the relationship between consecutive numbers in the series.

1. **From 33 to 363**:
- If we multiply 33 by 10 and then add 33, we get:
\[ 33 \times 10 + 33 = 330 + 33 = 363 \]

2. **From 363 to 3993**:
- Again, if we multiply 363 by 10 and then add 363, we get:
\[ 363 \times 10 + 363 = 3630 + 363 = 3993 \]

3. **From 3993 to 43923**:
- Similarly, if we multiply 3993 by 10 and then add 3993, we get:
\[ 3993 \times 10 + 3993 = 39930 + 3993 = 43923 \]

### Step 2: Find the next number in the series
Now we will apply the same pattern to find the next number after 33.

- We will denote the next number as \( X \). According to the pattern:
\[ X \times 10 + X = 33 \]
This can be simplified to:
\[ 11X = 33 \]
Dividing both sides by 11 gives:
\[ X = \frac{33}{11} = 3 \]

### Conclusion
Thus, the next number in the series is **3**.