# Math 8R

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Which of the following is NOT a real number?
a) 0.0005
b) 13/0
c) square root of 1/16

I picked c, am i correct???????

• Math 8R -

Yes.

• Math 8R -

thank you

• Math 8R -

Sorry, completely misread the order of the letters. No, b is correct. Because 13/0 is undefined.

• Math 8R -

ohhhhh

thank you!

• Math 8R -

The square root of 1/16 is 0.25 which is a real number. When the number under the square root is negative , that's when you have a number that is not real.

• Math 8R -

You're welcome.

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