Arrange the following in ascending order.
`39126, 39216, 42216, 38158, 41206`

Answer

To arrange the numbers `39126, 39216, 42216, 38158, 41206` in ascending order, we will follow these steps:

### Step 1: Identify the numbers
The numbers we need to arrange are:
- 39126
- 39216
- 42216
- 38158
- 41206

### Step 2: Compare the first digits
We will first compare the first digits of each number:
- 3 (for 39126 and 39216)
- 4 (for 42216)
- 3 (for 38158)
- 4 (for 41206)

Since the smallest first digit is 3, we will focus on the numbers starting with 3: `39126, 39216, 38158`.

### Step 3: Compare the second digits of the numbers starting with 3
Now we compare the second digits of the numbers starting with 3:
- 9 (for 39126)
- 9 (for 39216)
- 8 (for 38158)

The smallest second digit is 8 (from 38158), so 38158 is the smallest number.

### Step 4: List the smallest number
The smallest number is:
- 38158

### Step 5: Remove the smallest number and compare the remaining numbers
Now we have the remaining numbers:
- 39126
- 39216
- 41206
- 42216

### Step 6: Compare the first digits of the remaining numbers
The first digits are:
- 3 (for 39126 and 39216)
- 4 (for 41206)
- 4 (for 42216)

Again, we focus on the numbers starting with 3: `39126, 39216`.

### Step 7: Compare the second digits of the remaining numbers starting with 3
Now we compare the second digits:
- 9 (for 39126)
- 9 (for 39216)

Since both have the same second digit, we will compare the third digits:
- 1 (for 39126)
- 2 (for 39216)

The smallest third digit is 1 (from 39126), so 39126 is the next smallest number.

### Step 8: List the next smallest number
The next smallest number is:
- 39126

### Step 9: Remove the next smallest number and compare the remaining numbers
Now we have:
- 39216
- 41206
- 42216

### Step 10: Compare the first digits of the remaining numbers
The first digits are:
- 3 (for 39216)
- 4 (for 41206 and 42216)

Since 3 is the smallest, we will keep 39216.

### Step 11: List the next smallest number
The next smallest number is:
- 39216

### Step 12: List the remaining numbers
Now we have:
- 41206
- 42216

### Step 13: Compare the first digits of the last two numbers
The first digits are:
- 4 (for both 41206 and 42216)

Since both have the same first digit, we compare the second digits:
- 1 (for 41206)
- 2 (for 42216)

The smallest second digit is 1 (from 41206), so 41206 is the next smallest number.

### Step 14: List the next smallest number
The next smallest number is:
- 41206

### Step 15: List the last remaining number
The last remaining number is:
- 42216

### Final Arrangement
Now, we can list all the numbers in ascending order:
1. 38158
2. 39126
3. 39216
4. 41206
5. 42216

### Final Answer
The numbers arranged in ascending order are:
**38158, 39126, 39216, 41206, 42216**

---