The given pattern suggests that the multiplication sign ( * ) does not represent standard multiplication. Let's look closely at the equations and try to uncover a relationship.

1. $2 * 4 = 8$
2. $5 * 3 = 13$
3. $3 * ? = 11$

For the first equation, $2 * 4 = 8$, this matches normal multiplication (2 × 4 = 8).

For the second equation, $5 * 3 = 13$, normal multiplication gives 15, but the result is 13, so we can assume there is an adjustment. Perhaps we subtract 2 from the product:
$5 \times 3 = 15$, and $15 - 2 = 13$.

Next, for $3 * ? = 11$, using the same logic, we need to find what number multiplied by 3 gives 11 after subtracting 2:
$3 \times 4 = 12$, and $12 - 2 = 11$. So, $? = 4$.

Now, to find $7 * 5$, we use the same method: $7 \times 5 = 35$, and subtract 2:
$35 - 2 = 33$.

Thus, the value of $7 * 5 = 33$.

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Would you like more details on how the pattern works, or do you have other questions? Here are some related questions you can explore:

1. How can we represent this pattern as a general rule for any numbers?
2. What if the pattern involved addition or division instead of subtraction?
3. Could this pattern be extended to higher numbers, like 10 * 8 or 6 * 9?
4. How can you test if a pattern follows consistency across various operations?
5. Can you create a new pattern that uses different operations, like exponentiation?

Tip: Always check for consistency in any pattern, and consider simple operations like addition or subtraction to spot the rule!