1, 1, 3, 9, 5, 25, 7, 49 _, 81

• 9
  1,1^2
  3,3^2
  5,5^2....
• 12 years agoHelpfull: Yes(15) No(4)
• 9
  
  as seq is
  
  1, 1, 3, 9, 5, 25, 7, 49 9, 81
  two series are there.
  1,3,5,7,9 ...odd numbers
  and 1,9,25,49,81 .. square of odd numbers
• 12 years agoHelpfull: Yes(11) No(1)
• 9
  
  sol :: two series are present in their,
  1st series: 1,3,5,7....
  2nd series: 1,9,25,49,81.....
  so next term in 1st series will : 9 (as series is increase by 2 in every term)
  
  
• 12 years agoHelpfull: Yes(2) No(0)
• 1^2=1
  3^2=9
  5^2=25
  7^2=49
  9^2=81
  so ans is 9
• 12 years agoHelpfull: Yes(2) No(1)
• this is the alternative series.1,3,5,7,-.this is the one series.and 1,9,25,49,81 this another series.the next series is generated squares of the first series.so the answer is 9.
• 12 years agoHelpfull: Yes(1) No(0)
• ans is 9
  there are 2 series
  1st series 1,3,5,7,9
  2nd series 1,9,25,49,81
• 11 years agoHelpfull: Yes(1) No(0)
• ans:9;
  
  1^2=1;
  3^2=9;
  5^2=25;
  7^2=49;
  so,9^2=81
• 12 years agoHelpfull: Yes(0) No(0)
• 1,1^2
  3,3^2
  5,5^2
  7,7^2
  9,9^2
  answer: 9
• 12 years agoHelpfull: Yes(0) No(0)
• the series is in the order of number and its square root then answer is 9...
• 12 years agoHelpfull: Yes(0) No(0)
• ans is 9
  bcoz
  alternate numbers 1,3,5,7,9
  
• 12 years agoHelpfull: Yes(0) No(0)
• aangur khaoooo
  9
  
• 12 years agoHelpfull: Yes(0) No(0)
• 1,1,3,9,5,25,7,49,--,81
  1,3,5,7 are prime no's so v should put 11 in a blank space......
• 12 years agoHelpfull: Yes(0) No(0)
• there are two alternative series.
  One is 1, 3, 5, 7, 9.....
  and the other is 1^2=1, 3^2=9, 5^2=25, 7^2=49, 9^2=81.
  Hence the answer is 9.
• 12 years agoHelpfull: Yes(0) No(0)
• 1,1^2
  3,3^2
  5,5^2
  7,7^2
  9,9^2
• 12 years agoHelpfull: Yes(0) No(0)
• 1*3=3;3*3=9;5*5=25;7*7=49;9*9=81;so the ans is 9
• 12 years agoHelpfull: Yes(0) No(0)
• take the difference between numbers ...it`s like one number increasing and in the next time it decreases 2..
  
  9-3=6
  decrease the value 2 from the result
  9-4=5
  simillarly
  25-5=20
  decrease the value 2 from the result
  25-18=7
  
  49-7=42
  decrease the value 2 from the result
  49-40=9
• 11 years agoHelpfull: Yes(0) No(1)
• 1,(1)^2,3,(3)^2,5,(5)^2,7,(7)^2,-,(9)^2
  the blank space is filled by 9
  9 is answer
• 10 years agoHelpfull: Yes(0) No(0)
• 1*1=1
  3*3=9
  5*5=25
  7*7=49
  9*9=81
• 10 years agoHelpfull: Yes(0) No(0)
• ans is 9
  if we look carefully alternate numbers in the odd positions are odd i.e, 1,3,5,7,9
  and the no.s in even positions are the squares of the no.s in the odd positions.
• 9 years agoHelpfull: Yes(0) No(0)
• 1*1=1
  3*3=9
  5*5=25
  7*7=49
  9*9=81
  ans=9
• 9 years agoHelpfull: Yes(0) No(0)
• odd pos =1,3,5,7,9
  even pos=1^2=1,3^2=9,5^2=25,7^2=49,9^2=81
  
• 9 years agoHelpfull: Yes(0) No(0)
• Ans:9. 1,1square=1,3,3square=9,5,5square=25,7,7square=49,9,9square=81.
• 9 years agoHelpfull: Yes(0) No(0)
• 9 odd number in consecutative numbers
• 9 years agoHelpfull: Yes(0) No(0)
• it is series of prime numbers and their series
  1 square=1
  9 square=81
• 9 years agoHelpfull: Yes(0) No(0)
• 1, 1*1=1, 3, 3*3=9, 5, 5*5=25, 7, 7*7=49, ?, 81
  
  i.e., 9 and 9*9=81
• 9 years agoHelpfull: Yes(0) No(0)
• ans 9 as oddno multiplied with odd no of
  as 1*1=1,3*3=9, 5*5=25, 7*7=49, then 9*9=81
• 9 years agoHelpfull: Yes(0) No(0)
• 1*1=1
  3*3=9
  5*5=25
  7*7=49
  9*9=81
  So the value is 9
• 5 years agoHelpfull: Yes(0) No(0)