Question 32Asked in BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam)

Which one of the following numbers has rational square root?निम्नलिखित में से किस संख्या का परिमेय वर्गमूल है?

निम्नलिखित में से किस संख्या का परिमेय वर्गमूल है?
  1. A0·40·4
  2. B0·090·09
  3. C0·90·9
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (B) 0·090·09

Explanation

√0·09 = 0·3, which is rational; 0·4 and 0·9 are 4/10 and 9/10, whose square roots are irrational (√0·9 = 3/√10, √0·4 is irrational).√0·09 = 0·3 परिमेय है; 0·4 और 0·9 के वर्गमूल अपरिमेय हैं।

From BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam) — Previous Year Paper

This is question 32 of BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam) — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.