Q. Find out the wrong number in the series.
196, 169, 144, 121, 100, 80, 64

Option
A. 169
B. 144
C. 121
D. 100
E. 80

• all number are squre are any one
  as 196=14^2
  169=13^2
  144=12^2
  121=11^2
  100=10^2
  64=8^2
  but the number 80 is not squre of amy one number
  so answer is E
• 11 years agoHelpfull: Yes(3) No(0)
• The wrong no. is 80 which is not a square of any other no,.
• 12 years agoHelpfull: Yes(0) No(1)
• n^2
  9^2=81
  ans=80
• 10 years agoHelpfull: Yes(0) No(0)
• Ans E.80
  All Are Squares Except 80
• 10 years agoHelpfull: Yes(0) No(0)
• 196-169=27
  169-144=25
  144-121=23
  121-100=21
  100-80=20
  80-64=16
  if the replace 80 with 79 then the odd series will get so the wrong one is 80
• 10 years agoHelpfull: Yes(0) No(0)
• All are square of 14,13,12,11,10 and 8 resp
  so 80 is wrong
  there should be 81
• 10 years agoHelpfull: Yes(0) No(0)
• ans:80
  8^2=64
  9^2=81
  10^2=100
  11^2=121
  12^2=144
  13^2=169
  14^2=196
  from this 80 is wrong ans
• 8 years agoHelpfull: Yes(0) No(0)
• the answer is E i.e 80
• 8 years agoHelpfull: Yes(0) No(0)
• 80 because all above numbers are square of 14,13,12,11,10 but 80 is not
• 6 years agoHelpfull: Yes(0) No(0)
• 80 because diff b/w 196&169=27
  diff b/w 169&144=25
  diff b/w 144&121=23
  diff b/w 121&100=21
  but diff b/w 100&80=20
  since we have all odd and here diff is even
  hence 80 is wrong
• 6 years agoHelpfull: Yes(0) No(0)