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Home Aptitude Square Root and Cube Root Comments

  • Question
  • √1.5625 =?


  • Options
  • A. 1.05
  • B. 1.25
  • C. 1.45
  • D. 1.55

  • Correct Answer
  • 1.25 

    Explanation
       1|1.5625( 1.25
        |1
        |-------
      22| 56
        | 44
        |-------
     245| 1225
        | 1225
        |-------
        |    X
        |-------     
    
    ∴ √1.5625 = 1.25.

    Square Root and Cube Root problems


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    • 1. If a = 0.1039, then the value of √4a2 - 4a + 1 + 3a is:


    • Options
    • A. 0.1039
    • B. 0.2078
    • C. 1.1039
    • D. 2.1039
    • Discuss
    • 2. If 3√5 + √125 = 17.88, then what will be the value of √80 + 6√5?


    • Options
    • A. 13.41
    • B. 20.46
    • C. 21.66
    • D. 22.35
    • Discuss
    • 3. 
      What should come in place of both x in the equation x = √162 .
      √128 x

    • Options
    • A. 12
    • B. 14
    • C. 144
    • D. 196
    • Discuss
    • 4. The least perfect square, which is divisible by each of 21, 36 and 66 is:

    • Options
    • A. 213444
    • B. 214344
    • C. 214434
    • D. 231444
    • Discuss
    • 5. 
      √3 - 1 2 simplifies to:
      √3

    • Options
    • A.
      3
      4
    • B.
      4
      √3
    • C.
      4
      3
    • D. None of these
    • Discuss
    • 6. The sum of three numbers is 98. If the ratio of the first to second is 2 :3 and that of the second to the third is 5 : 8, then the second number is:

    • Options
    • A. 20
    • B. 30
    • C. 48
    • D. 58
    • Discuss
    • 7. The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?

    • Options
    • A. 8 : 9
    • B. 17 : 18
    • C. 21 : 22
    • D. Cannot be determined
    • Discuss
    • 8. If 40% of a number is equal to two-third of another number, what is the ratio of first number to the second number?

    • Options
    • A. 2 : 5
    • B. 3 : 7
    • C. 5 : 3
    • D. 7 : 3
    • Discuss
    • 9. Salaries of Ravi and Sumit are in the ratio 2 : 3. If the salary of each is increased by Rs. 4000, the new ratio becomes 40 : 57. What is Sumit's salary?

    • Options
    • A. Rs. 17,000
    • B. Rs. 20,000
    • C. Rs. 25,500
    • D. Rs. 38,000
    • Discuss
    • 10. If Rs. 782 be divided into three parts, proportional to ½ : ⅔ : ¾, then the first part is:

    • Options
    • A. Rs. 182
    • B. Rs. 190
    • C. Rs. 196
    • D. Rs. 204
    • Discuss


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