3, 1, 13, 11, 31, 29,________ a) 51 b) 63 c) 61 d) 57

• 61 is the answer because each 2nd term id subtracted by -2 ti previous term and next no is 1+(3^2+3) , 11+(4^2+4) next will be 31+(5^2+5) that is 61
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• d) in my point of veiw--57
  3-1 =2 13-11 =2 31-29=2
  now 3+10= 13 nd 13+18=31 means every 3rd term
  now we require to add something in 31=?
  now diff b/w 10 nd 18 is =8
  now add 8 in 18 = 26
  now 26+31 = 57 ans...
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• 3+10=13
  1+10=11
  13+18=31
  11+18=29
  31+26=57(here 26-18=8,18-10=8)
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• 3-1=2
  13-1=12
  13-11=2
  31-11=20
  31-29=2
  So,
  29+28=57Ans.
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