To solve this, we need to find the pattern in the sequence: 183, 305, 527, 749, 961, ...

Let's analyze the differences between consecutive terms:

• $305 - 183 = 122$
• $527 - 305 = 222$
• $749 - 527 = 222$
• $961 - 749 = 212$

So, the differences between consecutive terms are: 122, 222, 222, and 212.

Since the differences seem to fluctuate around 222, let's assume the next difference might be close to 222. Adding 212 (the last difference) to 961, we get:

$961 + 212 = 1173$

Thus, the next number in the sequence is 1173, which matches option a.

Would you like more details or have any further questions?

Here are 5 related questions:

1. What is an arithmetic sequence, and how is it different from this one?
2. Can you predict the 7th term in this sequence?
3. How do geometric sequences differ from this kind of pattern?
4. What methods can you use to identify patterns in sequences?
5. How can sequences be applied in real-world situations?

Tip: Always check the differences between consecutive terms when working with sequences—it helps identify patterns quickly.