idealhr

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About idealhr

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    Advanced Member
  • Birthday 07/07/1972

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    http://www.idealhrservice.in/

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    Male
  • Location
    Tamil Nadu, India
  • Interests
    HR Services, Staff Recruitment, Legal Liasioning
  1. 42457 cannot be a square of any number.
  2. The answer is 37. It is a Fibonacci series.
  3. The link is really helpful and informative. Thanks for sharing.
  4. Area of the remaining portion of the triangle= Area of the equilateral triangle – Area of inscribed circle=144√3−48π cm2
  5. On expansion it's apparent that every term would be divisible by 18 except for the last term which would be -1^(200) which is 1. Hence, the remainder would be 1.
  6. Sol:Distance = 600 kmSpeed = 100 km/hrTime taken = Distance / Speed= 600 / 100= 6 HrNumber of stops for 600 km = (600 / 75) - 1= 7Time of stopping after every 75 km = 3 minTotal time of stoppings = 3 x 7 = 21 minTime taken to reach the destination = 6 hrs 21 min.
  7. The right answer is 8 as explained by Shamshad.
  8. @nikunjmis right. Can you explain it in detail?
  9. Thanks for the brief explanation of this problem.
  10. There are various online sites available for practice along with tutorials.
  11. let speed in stagnant water is x and speed of current=y.so 12/x-y-12/x+y=6..1/x-y-1/x+y=1/2==2y/x^2-y^2=1/2.. similarly from second condition 2y/4x^2-y^2=1/12..so 4x^2-y^2/x^2-y^2=6..so 2x^2=5y^2..so puttng this value in any of the condition we'll get y=8/3.
  12. Arranging 6 rings to 3 fingers means selecting 3 rings from 6 rings and ornate them in 3! ways.i.e.,(6C3)× 3! ways nothing but 6P3 since nCr× r! = nPr6P3 is 6× 5 × 4 = 120
  13. Can you please elaborate in detail as I felt the puzzle is incomplete or partially built.
  14. Thanks for sharing the answer. The aptitude is really helpful.
  15. A negative exponent means how many times to divide by the number. In this case, 5^-3 indicates, 1/(5x5x5) ie., 1/125 = .008.