2. Sample Papers
  3. Railways
  4. Quantitative Aptitude
  5. LCM & HCF

Railways Quantitative Aptitude LCM & HCF Sample Paper HCF and LCM Sample Test Paper-2

  • question_answer
    The LCM and HCF of two numbers are 84 and 21, respectively. If the ratio of two numbers be 1: 4, then the larger of the two numbers is:

    A)  21       

    B)         48      

    C)  84       

    D)  108

    Correct Answer: C

    Solution :

    [c] Let the number be x and 4x. Then, \[84\times 21=x\times ~4x\] or \[4{{x}^{2}}=1764\] or \[{{x}^{2}}=441\] or x = 21 \[\Rightarrow \]\[4x=4\times 21=84\] Thus the largest number = 84


You need to login to perform this action.
You will be redirected in 3 sec spinner