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The decimal 5.02002000200002... can represent which type of number?

Answer and explanation

Correct answer: Irrational

The key concept is the distinction between terminating, recurring, and non-recurring decimal expansions. The decimal 5.02002000200002... continues indefinitely, so it is non-terminating. Its blocks do not repeat with one fixed period: the numbers of zeros between successive 2s increase, so no finite string of digits can repeat forever. A rational number has a decimal expansion that either terminates or eventually repeats periodically. Since this expansion is non-terminating and non-periodic, it represents an irrational number; option C is correct. It cannot be a terminating rational because digits continue, cannot be an eventually recurring rational because there is no fixed cycle, and cannot be an integer because a nonzero decimal tail remains.

Related tags

Decimal RepresentationIrrational NumbersRecurring DecimalsNumber SystemsMathematicsClass 9 Mcq

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