Determine the greatest 2-digit number that is formed after omitting one of the digits
in the number 786 while keeping the digits in the same order.
If you omit 7, the number is 86.
If you omit 8, the number is 76.
If you omit 6, the number is 78.
The number 86 has the most tens, so it is the greatest number that can be formed.