2,1,3,3,5,5,7,7,?

1)11
2)8
3)9
4)7

• it will be 11.
  Alternate prime numbers 2 ,_,3,_,5,_,7,_,11
• 5 years agoHelpfull: Yes(9) No(2)
• alternate prime and odd series... hence ans is 11
• 5 years agoHelpfull: Yes(2) No(0)
• 2,_3,_5,_7,_11
• 5 years agoHelpfull: Yes(1) No(1)
• 11, alternate odd and primary number series
• 5 years agoHelpfull: Yes(1) No(0)
• it will be 7,because 2 and 1 for 1 time. 3 and 5 for twotimes and thereafter 7 will come. 7 for 3 times. then 11 for three times
• 5 years agoHelpfull: Yes(1) No(2)
• 2,3,5,7,...(odd places)
  Ans:9
• 5 years agoHelpfull: Yes(0) No(5)
• 9 is the answer.
• 4 years agoHelpfull: Yes(0) No(1)
• 11
  prime and odd series
• 4 years agoHelpfull: Yes(0) No(0)