198, 194, 185, 169, ?
A. 92
B. 112
C. 136
D. 144

• 198-2*2=194
  194-3*3=185
  185-4*4=169
  169-5*5=144
• 7 years agoHelpfull: Yes(12) No(0)
• Difference of consecutive terms increases in terms of squares ( 2^2,3^2,4^2,5^2)
  Ans is D)144.
• 7 years agoHelpfull: Yes(1) No(0)
• 198-194=4=2^2;
  194-185=9=3^2;
  185-169=16=4^2;
  so the next difference will be the square of 5, 5^2=25;
  so the next term is = 169-25=144
  ans: 144
  
  
• 7 years agoHelpfull: Yes(1) No(0)
• Answer is D
  
• 7 years agoHelpfull: Yes(0) No(0)
• 198-194=4=2^2
  194-185=9=3^2
  185-169=16=4^2
  169-x=25=> x=169-25=144=> x=144
• 7 years agoHelpfull: Yes(0) No(0)
• 198-(2)^2=194
  194-(3)^2=185
  185-(4)^2=169
  169-(5)^2=144
• 7 years agoHelpfull: Yes(0) No(0)
• the difference is the square of numbers beginning from 2
  so the last number in the series is 144.
• 6 years agoHelpfull: Yes(0) No(0)