27,16,10,9,???

• 27-(5*2+1)=16
  16-(5*1+1)=10
  10-(5*0+1)=9
  9-(5*(-1)+1)=13
  ans =13
  
• 11 years agoHelpfull: Yes(26) No(4)
• ans:-13
  difference between coseq.no are in sequence with difference 5.
  (11,6,1,-4)11-6=5;6-1=5;1-(-4)=5
• 11 years agoHelpfull: Yes(13) No(0)
• 27-16=11
  16-10=6 diff 5
  10-9=1 diff 5
  9-13=-4 diff 5
  Ans:13
• 11 years agoHelpfull: Yes(7) No(1)
• ans 15
  27-16=11,11-6=5
  16-10=6,6-1=5
  10-9=1
  ?
  ans=5+1+9
  
  
• 11 years agoHelpfull: Yes(2) No(4)
• ans 13
  triangular series 27 16 10 9 ?=13
  diff 11 6 1 ?=-4
  5 5 5
  
• 11 years agoHelpfull: Yes(0) No(0)
• 27-16=11,16-10=6,10-9=1,9-y=x,x=ans
  using triangular series method
  11-6=5,6-1=5,we take 1-(-4)=5=>9-(-4)=13
  therefore,x=13 ans
• 11 years agoHelpfull: Yes(0) No(0)