How many 4 - digit numbers are there ?

Options

A. 8999
B. 9000
C. 8000
D. none of these

Answer

To find out how many 4-digit numbers there are, we can follow these steps:

### Step 1: Identify the Range of 4-Digit Numbers
The smallest 4-digit number is 1000, and the largest 4-digit number is 9999.

### Step 2: Calculate the Total Number of 4-Digit Numbers
To find the total number of 4-digit numbers, we can use the formula for counting numbers in a range:
- Total 4-digit numbers = Largest 4-digit number - Smallest 4-digit number + 1

So, we calculate:
- Total 4-digit numbers = 9999 - 1000 + 1

### Step 3: Perform the Calculation
Now, we perform the subtraction and addition:
- 9999 - 1000 = 8999
- 8999 + 1 = 9000

### Conclusion
Thus, the total number of 4-digit numbers is **9000**.

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