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Logarithms having base ‘10’ are called

  • A.pure logarithms
  • B.common logarithms/Briggesian logarithms
  • C.natural logarithms
  • D.infinite logarithms

Answer: B

Logarithms to base 10 are the common logarithms, also called Briggsian after Henry Briggs, who computed the first base-10 tables.

They are the convenient base for hand arithmetic because our numerals are base 10: \( \log 1000 = 3 \) exactly, and multiplying a number by 10 simply adds 1 to its logarithm, which is what makes the characteristic and mantissa split work.

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