Which of these is an integer?

1

-2

25

all of these

What makes a number rational?

It does not repeat forever.

It can be written without using a decimal point.

It can be written as an integer divided by an integer.

It does not have any square roots or scientific notation.

Which of these is rational?

`sqrt(5)`

`-1/3`

`sqrt(-4)`

all of these

Which of these statements is false?

All irrational numbers are real.

Some rational numbers are integers.

Some imaginary numbers are rational.

Some complex numbers are not imaginary.