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Which number is irrational? Select one: a. √169 b. √144 c. √81 d. √156

Mathematics
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What's a rational number?
A rational number is a number that can be expressed as a fraction or ratio (rational). The numerator and the denominator of the fraction are both integers.
A rational number can also be a whole number.

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Other answers:

so the square root of 169 is 13, correct?
The number 13 is a rational number because it's a whole number.
yes 13 is right for 169
That means option A is not irrational, thus not the correct answer.
Option B is not irrational as well because that will give you 12. So is option C. That also gives you a whole number of 9.
Tell me what option D would give me? @Yolo4mecuite
option D is 12.5 for squr 156
Yeah ^^^^
So D is rational
no we are looking for irrational
Yes sorry
12.5 is not s whole number so it is irrational
I knew it was D, was just trying to teach
Oh ok Thank you! :)
hope I helped not hindered here.
12.5 is a rational number. That's a fraction with integers. The square root of 156 does not contain recurring numbers which means it's irrational.
yep you are right :)
good job..
Nice Work!

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