If $8+4=96$ and $7+3=70$, then $6+5=?$

The correct option is 66.

To solve this pattern-based puzzle, let us analyze the relationship between the numbers given in the equations.

Step 1: Analyze the first equation

$8+4=96$

Notice that if we first add the two numbers: $8+4=12$

Then, if we multiply this sum by the first number ($8$), we get:

$12\times 8=96$

Step 2: Verify the pattern with the second equation

$7+3=70$

First, add the two numbers: $7+3=10$

Next, multiply this sum by the first number ($7$):

$10\times 7=70$

The pattern holds true!

Step 3: Apply the pattern to find the missing value

$6+5=?$

First, add the two numbers: $6+5=11$

Next, multiply this sum by the first number ($6$):

$11\times 6=66$

Therefore, the value of $6+5$ according to this logic is 66.