**Q3: **

What is the name of a set which has no elements?

- Afinite set
- Binfinite set
- Cnull set

**Q4: **

Which of the following choices is an infinite set?

- A the set of multiples of 7 smaller than 343
- B the set of whole numbers less than 84
- C the set of whole numbers between 7 and 343
- D the set of multiples of the number 4

**Q5: **

Is the following set null or not?

The set of the governerates in Upper Egypt that are located on the Mediterranean Sea.

- Anull
- Bnot null

**Q6: **

Is the following set null or not?

- Anot null
- Bnull

**Q7: **

Is the following set null or not?

The set of Arabic countries in Australia.

- Anull
- Bnot null

**Q8: **

Is the following set null or not?

The set of Egyptian governerates in Asia.

- Anot null
- Bnull

**Q9: **

A set that has a limited number of elements is called a/an set.

- Anull
- Binfinite
- Cfinite

**Q10: **

Is the following set null or not?

The set of students in your class who have been to the moon.

- Anull
- Bnot null

**Q11: **

A set that has an unlimited number of elements is called a/an set.

- Afinite
- Bnull
- Cinfinite

**Q12: **

Sets that contain the same number of elements are called .

- A equal sets
- B different sets
- C equivalent sets