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galibhaskar
 one year ago
number of numbers of the form 30a0b03 where a,b are digts which are divisible by 13 is
galibhaskar
 one year ago
number of numbers of the form 30a0b03 where a,b are digts which are divisible by 13 is

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rajat97
 one year ago
Best ResponseYou've already chosen the best response.0can you please explain this question , as a and b cannot be digits as any single digit is not divisible by 13 and if they are

LastDayWork
 one year ago
Best ResponseYou've already chosen the best response.0For divisibility by 13 refer: http://en.wikipedia.org/wiki/Divisibility_rule#Divisibility_by_13 ∴ set of (a,b) such that 30a0b03 is divisible by 13 ={ (a,b) : 6+3a4b=13n ; n∈N∪{0} } where a,b are digits You can do trial and error from here.
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