SOLUTION: Which of the following is not a rational number? a. -4 b. 1/5 c. 0.833333333.......... d. 0.45 e. squareroot 2

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square root of 2 is not a rational number.
A number which can be expressed in the form p/q, q not equal to 0 is called a rational number.
square root of 2 cannot expressed as a rational no:, its irrational number.
all other number given can be written in the form p/q.