In recreational mathematics, a Harshad number (or Niven number) in a given number base, is an integer that is divisible by the sum of its digits when written in that base. Harshad numbers in base n are also known as n-Harshad (or n-Niven) numbers. Harshad numbers were defined by D. R. Kaprekar, a mathematician from […]

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“A Project Manager’s Lessons Learned” is a compilation of lessons learnt by Jerry Madden back in 1995 , Associate Director of the Flights Project Directorate at NASA’s Goddard Space Flight Center. Now why should we care about these rules. You only need one reason “NASA has a great track record of successful missions and they […]

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