Number
Is it a
whole
number?
Yes
Rational
Number
No
Yes
Yes
Is the
denominator
zero?
Is it a
fraction?
undefined
Rational
Number
No
No
Is it a
decimal?
Yes
Does it
terminate
(or end)?
Yes
Rational
Number
No
Does it
repeat?
No
No
Is it a
square
root?
No
Go back and
recheck your
number.
Yes
Is it a perfect
square
inside?
No
Yes
Rational
Number
Irrational
Number
Yes
Rational
Number
Irrational
Number