Question

Which of the following is rational?
Α)π
B)√40
C)√4
D)√2

Answer 1

C)
`\sqrt4`

Explanation:

Hello!

`\pi` is a irrational number because the decimal places keep going without ever repeating.

`\sqrt{40` is irrational, as a square root of a non-perfect square is always irrational.

`\sqrt4` is rational, as it equates to 2 and integers are rational.

`\sqrt2` is irrational, as a square root of a non-perfect square is always irrational.

Out of all of these options, only
`\sqrt4` works.