Q. What is the next number of the following sequence
2, 9, 5, 49, 11, 169, ?

• 2 3 4 5 6 7 8 9 10 11 12 13 17.... prime nos are-- 2,3,5,7,11,13,17.
  in the even places square the no and rest of d nos as it is..2,9,5,49,11,169,17.
  so the next term is 17.
• 10 years agoHelpfull: Yes(19) No(0)
• Even places are the square of prime no. Whereas odd places are prime no. So 17 is the correct answer.
• 10 years agoHelpfull: Yes(12) No(2)
• the answer will be 23. as odd places have the logic : 2*2 +1 =5, 5*2+1 =11, 11*2+1=23. had the odd places followed only the logic of prime numbers, then the next number in the odd place after 5 would have been 7. Regards.
• 10 years agoHelpfull: Yes(3) No(8)
• prime numbers
  2
  3*3=9
  5
  7*7=49 like 11,13*13,17
• 10 years agoHelpfull: Yes(2) No(0)
• 2,3,5,7,11,13,17,19 are the prime numbers...
  clearly we observe the problem even places are the square of the prime numbers and odd places are remain same. so the answer is 17..
• 10 years agoHelpfull: Yes(1) No(0)
• 17..
  
  2,3*3,5,7*7,11,13*13,17
• 10 years agoHelpfull: Yes(1) No(0)
• 2,9,5,49,11,169
  2,5,11-->23 or 20 [11+9 or 11+12]
  9,49,169-->649
• 10 years agoHelpfull: Yes(0) No(2)
• the correct answer is 17
  
  2, 3*2, 5, 7*2,11, 13*2, 17
  the prime numbers are 2,3,5,7,11,13,17
  every second number is squared,
  
  
• 7 years agoHelpfull: Yes(0) No(0)
• 17
  Alternate series of prime numbers and their squares
• 7 years agoHelpfull: Yes(0) No(0)