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Logarithm having base 10 are called…system/logarithm.
a) common                 
b) natural
c) Briggs                                 
d) both a and c

d

Explanation:inventor of common logarithm (Henry Briggs).


Characteristic and Mantissa:

Every Logarithm has two parts Characteristic and Mantissa, where the Whole part is called Characteristic and the Decimal part is called Mantissa.



the integral part of the logarithm of any number is called the……………
a) Characteristic                     
b) Mantissa
c) Forma                                  
d) Collector

a



the characteristic may be………
a) positive                                            
b) negative
c) both a and b                    
d) none of these

c


b

The decimal part of the common logarithm of a number is called the……………….
a) Characteristic                 
b) Mantissa
c) Logarithm                        
d) None of these

b