121, 225, 361, ?
1] 441 2] 484
3] 529 4] 729

• 3] 529
  121 = 11^2,
  225 = 15^2,
  361 = 19^2,
  
  11,15,19,23(+4 of previous)
  next is (19+4)^2 = 23^2 = 529
• 10 years agoHelpfull: Yes(18) No(0)
• 11^2=121,11+4=15^2=225,15+4=19^2=361,19+4=23^2=529
• 10 years agoHelpfull: Yes(1) No(0)
• 529.11^2=121,15^2=225,19^2=361,23^@=529
• 10 years agoHelpfull: Yes(0) No(0)
• 11*11=121
  15*15=225
  19*19=361
  23*23=529
• 10 years agoHelpfull: Yes(0) No(1)
• ans:484
  
• 10 years agoHelpfull: Yes(0) No(1)
• 19+4=23 and the square of 23 is 529
• 10 years agoHelpfull: Yes(0) No(0)
• 11^2=121
  15^2=225
  19^2=361
  23^2=529
  answer is 3)529
• 10 years agoHelpfull: Yes(0) No(0)
• 11*11=121;
  15*15=225;
  19*19=361;
  23*23=529
• 10 years agoHelpfull: Yes(0) No(0)
• it is squares of n.os in increasing order with differnce of 4
  
  i..e,11^2,15^2,19^2,23^2
  
  so the answer is 23^2=529
  
  
• 10 years agoHelpfull: Yes(0) No(0)
• 
  as 11*11=121
  15*15=225
  19*19=361
  so
  23*23=529
• 10 years agoHelpfull: Yes(0) No(0)
• the square of 2 is 441.......
• 10 years agoHelpfull: Yes(0) No(0)
• apart from squares of numbers...we can see as
  
  100+(4X1)=104.........121+104=225
  100+(4X9)=136.........225+136=361
  100+(4X17)=168........361+168=529
  
  hence ans is 529
• 10 years agoHelpfull: Yes(0) No(0)
• 529
  11^2,15^2,19^2,23^2
• 10 years agoHelpfull: Yes(0) No(0)
• 529
  11*11=121
  15*15=225
  19*19=361
  23*23=529
• 10 years agoHelpfull: Yes(0) No(0)
• 11^2,15^2,19^2,23^2
  ans=529
• 10 years agoHelpfull: Yes(0) No(0)
• 529 beacuse they are perfect squares with a difference of 3 i.e. 11,15,19 so the next number is 23 whose square is 529 which is the answer
• 10 years agoHelpfull: Yes(0) No(0)
• It is in the form of 11^2,15^2,19^2. So. Answer is 27^2=729 option 4
• 10 years agoHelpfull: Yes(0) No(0)
• 529. 11^2, 15^2, 19^2 and then 23^2
  
• 10 years agoHelpfull: Yes(0) No(0)
• 529
  121 is the square of 11
  225 is the square of 15
  361 is the square of 19
  529 is the square of 23 and ans is 23
  
• 10 years agoHelpfull: Yes(0) No(0)
• 3] 529
  1st number is square of 11.
  second number is square of 15
  3rd number is square of 19
  so, now 4th number will be square of 23
• 10 years agoHelpfull: Yes(0) No(0)
• 11*11=121
  15*15=225
  19*19=361
  the diff b/w 11,15 and 15,19 is 4.so the next number would me 19=4=23.
  so 23*23=529
  ans is 529(3)
• 10 years agoHelpfull: Yes(0) No(0)
• 529....
  121+124=225
  225+146=361
  361+168=529
• 10 years agoHelpfull: Yes(0) No(0)
• 11×11=121, 11+4=15: 15×15=225, 15+4=19: 19×19=529
• 6 years agoHelpfull: Yes(0) No(0)
• 11^2+15^2+19^2(each has difference of 4 like 11+4=15+4=19+4=23)
  so 23^2=529 hence 3 is the answer
• 6 years agoHelpfull: Yes(0) No(0)