Let me work through this step-by-step.

Sally has 3 brothers.

Each of Sally's brothers has 2 sisters.

Since Sally is a girl, she is one of the sisters that each brother has.

If each brother has 2 sisters total, and Sally is one of them, then there must be 1 other sister besides Sally.

Therefore, Sally has 1 sister.

Sally has 1 sister.

Explanation:

• Sally is a girl.
• She has 3 brothers.
• All the siblings share the same sisters. Since Sally is one of the sisters, and each brother has 2 sisters in total, there must be one other girl besides Sally in the family.
• Therefore, Sally has 1 sister.

Here are 5 jokes:

1. Why don't scientists trust atoms? Because they make up everything!

2. What do you call a bear with no teeth? A gummy bear!

3. Why did the scarecrow win an award? He was outstanding in his field!

4. What do you call a fake noodle? An impasta!

5. Why don't eggs tell jokes? They'd crack each other up!

All 5 jokes are unique - each one has a different setup and punchline with no repeats.

5 Jokes:

1. Why did the scarecrow win an award? Because he was outstanding in his field.
2. Why did the golfer wear two pairs of pants? In case he got a hole-in-one.
3. What do you call a fish with no eyes? Fsh!
4. Why did the bicycle fall over? Because it was two tired.
5. What do you call a lazy kangaroo? A pouch potato.

All 5 jokes generated are unique in this list.