odd one out.
7,9,17,42,173,248

• i also think 9 because 9 is the square of a number
  
• 9 years agoHelpfull: Yes(8) No(2)
• alternate number is odd and even,but 2nd place should be even.but it is odd,so answer is 9
• 9 years agoHelpfull: Yes(7) No(9)
• I think 9......
• 9 years agoHelpfull: Yes(3) No(9)
• ans is 9
  these are arrange in alternate, odd & even
• 9 years agoHelpfull: Yes(1) No(2)
• 9,,Because 9 is square of a number..
• 9 years agoHelpfull: Yes(1) No(0)
• [gautam gaurav]
  alternate number is odd and even,but 2nd place should be even.but it is odd,so answer is 9
• 9 years agoHelpfull: Yes(1) No(1)
• odd and even arrangement so ans is 9
• 9 years agoHelpfull: Yes(0) No(3)
• answer is nnine becoz alternate numbers must be even...
  
• 9 years agoHelpfull: Yes(0) No(1)
• 7 is odd number 9 is also odd number but next number 17 it is odd number so on
  so here 9 is the answer
• 9 years agoHelpfull: Yes(0) No(0)
• the answer is 17.
• 9 years agoHelpfull: Yes(0) No(6)
• alternate number is odd and even,but 2nd place should be even.but it is odd,so answer is 9
• 9 years agoHelpfull: Yes(0) No(0)
• 9 is square
• 9 years agoHelpfull: Yes(0) No(0)