This problem involves comparing a set of five three-digit numbers and performing a specific subtraction based on their digits.

Identifying the Three-Digit Numbers

First, let's list the given five, three-digit numbers:

• 411
• 559
• 916
• 247
• 769

Finding the Highest and Lowest Numbers

Next, we need to identify the highest and lowest numbers from the list:

• Comparing the numbers: 247, 411, 559, 769, 916.
• The highest number is 916.
• The lowest number is 247.

Extracting the First Digits

According to the problem description, the first digit is the leftmost digit of the number. Let's find the first digit of the highest and lowest numbers identified:

• For the highest number, 916, the first digit is 9.
• For the lowest number, 247, the first digit is 2.

Performing the Subtraction

The question asks for the resultant obtained by subtracting the first digit of the lowest number from the first digit of the highest number. The operations are performed from left to right, but here we only have one operation.

The calculation is as follows:

First digit of highest number $ - $ First digit of lowest number

This translates to:

$ 9 - 2 $

Calculating the difference:

$ 9 - 2 = 7 $

Therefore, the resultant is 7.