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Which of the following is a rational number?

  • A.√2
  • B.√3
  • C.√4
  • D.√5

Answer: C

A rational number is a number that can be expressed as a fraction p/q of two integers, where q is not zero. An irrational number cannot be expressed as such.

√2, √3, and √5 are irrational.

√4 = 2, which can be written as 2/1. Therefore, it is a rational number.

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