Find the missing terms in the series : 3,20, 63,144,275,?
(a) 354
(b) 468
(c) 548
(d) 554

• b) 468
  
  1*3,2*10,3*21,4*36,5*55
  => next term of the form 6*x
  
  Consider 3,10,21,36,55,x
  Taking differences => 7,11,15,19
  => next difference = 23
  => x - 55 = 23 => x = 78
  
  => Next term = 6*78 = 468
• 11 years agoHelpfull: Yes(3) No(2)
• 1^2*3=3
  2^2*5=20
  3^2*7=63
  4^2*9=144
  5^2*11=275
  so,
  6^2*13=468
  
• 8 years agoHelpfull: Yes(1) No(0)