can anyone solve with solution and send it... urgently...a challenge...?
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Answer is option ( d )
Reason : It is a adding series in alternate manner.
Solution : 11 to 13 the gap is 2 then 13 to 17 is 4 and after that 17 to 19 is 2 according to this the last one number could be 23 ( gap of 4 from 19 )
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Answer:
it is option (d)49 ,23
as there is forming a chain of alternative no.s like,11,13,17,19 one has difference 2 and the another has difference of 4
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