1. What is the difference between whole numbers and integers?

Integers include negative numbers whereas the whole numbers do not.
I = {-4, -3, -2, -1, 0, 1, 2, 3, 4, ...}
W = {0, 1, 2, 3, 4,...}

2. What are irrational numbers?

Irrational numbers are any numbers that cannot be written as a fraction. e.g. Numbers that never end on the calculator and have no pattern, such as 3.1415923565...

3. What is the biggest multiple of 10?

There is never a biggest ever multiple. Multiples form INFINITE sets that go on and on and on and on and ...

4. Is "1" a prime number?

No, "1" is a special number but it is not classed as a prime number.

5. Is "2" a prime number?

Yes, because 2 has only two factors i.e. 2 and 1, it is classed as a prime number.

6. What is the reciprocal of 0?

The reciprocal of zero is not defined because you cannot say how many times zero divides into anything.