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Home Aptitude Square Root and Cube Root Comments

  • Question
  • If ? 2 = 1.4142, the value of 7/ (3 + ? 2) is?


  • Options
  • A. 1.5858
  • B. 4.4142
  • C. 3.4852
  • D. 3.5858

  • Correct Answer
  • 1.5858 

    Explanation

    7/(3 + ?2) = [7 x (3- ?2)] / [(3 + ?2) x (3- ?2)]
    = [7 x ( (3- ?2)] / 7
    = 3- ?2
    = 3 - 1.4142
    = 1.5858


  • Square Root and Cube Root problems


    Search Results


    • 1. 
      ?( 12 + ?12 + ?12 + ... =?

    • Options
    • A. 3
    • B. 4
    • C. 6
    • D. Greater than 6
    • Discuss
    • 2. 
      If ? 1 + 27/169) = (1 + N/13). then N equals?

    • Options
    • A. 1
    • B. 3
    • C. 5
    • D. 7
    • Discuss
    • 3. 
      ? (1.21 x 0.9) / (1.1 x 0.11) =?

    • Options
    • A. 2
    • B. 3
    • C. 9
    • D. 11
    • Discuss
    • 4. 
      If ? 2 n = 64, then the value of n is?

    • Options
    • A. 2
    • B. 4
    • C. 6
    • D. 12
    • Discuss
    • 5. 
      If ? 6 = 2.55, then the value of ? 2/3 + 3 ? 3/2 is?

    • Options
    • A. 4.48
    • B. 4.49
    • C. 4.50
    • D. None of these
    • Discuss
    • 6. 
      Which of the following numbers, Where in some of the digit have been suppressed by Symbols, can possibly be the perfect square of a 3 digit odd number.?

    • Options
    • A. 65xxx1
    • B. 9xx1
    • C. 10xxx4
    • D. 9xxxxxx5
    • Discuss
    • 7. 
      ? 0.04 x 0.4 x a = 0.4 x 0.04 x ? b, then the value of a/b is?

    • Options
    • A. 0.016
    • B. 1.60
    • C. 0.16
    • D. None of these
    • Discuss
    • 8. 
      The least perfect square number divisible by 3, 4, 5, 6, 8 is?

    • Options
    • A. 900
    • B. 1200
    • C. 2500
    • D. 3600
    • Discuss
    • 9. 
      (? 5 - ? 3)/ (? 5 + ? 3) is equal to?

    • Options
    • A. 4 + ?15
    • B. 4 - ?15
    • C. 1/2
    • D. 1
    • Discuss
    • 10. 
      If a = (? 5 + 1) / (? 5 - 1) and b = (? 5 - 1) / ( ? 5 + 1) then the value of (a 2 + ab + b 2) / (a 2 - ab + b 2) is?

    • Options
    • A. 3/4
    • B. 4/3
    • C. 3/5
    • D. 5/3
    • Discuss


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