The image shows a circle with several numbers inside, arranged in a pattern around a missing number represented by a question mark. The numbers given are:

• 268, 11, 359, 516, 263, 16, 17.

Let me analyze the pattern or rule governing these numbers to find the value of the missing number (marked as "?").

I'll attempt to deduce a possible sequence or mathematical relationship between the given numbers.

The differences between adjacent numbers are as follows:

• $11 - 268 = -257$
• $359 - 11 = 348$
• $516 - 359 = 157$
• $263 - 516 = -253$
• $16 - 263 = -247$
• $17 - 16 = 1$

These differences do not follow a simple arithmetic progression, so it's likely that a more complex pattern or rule is in place. I'll explore other possible relationships to determine the missing number. Let me check if any number is related to the sum of others, or perhaps another arithmetic operation.