4, 8, 24, 60, ? , 224

• 124 is the answer
  8-4=4 which is 2^2
  24-8=16 which is 4^2
  60-24=36 which is 6^2
  now
  x-60=64 which is 8^2
  so x=60+64=124
  now
  224-124=100 which is 10^2
  so the missing number is 124..
• 9 years agoHelpfull: Yes(17) No(0)
• 4+(2*2)=8
  8+(4*4)=24
  24+(6*6)=60
  60+(8*8)=124
  124+(10*10)=224
  
  so, Answer is 124.
• 9 years agoHelpfull: Yes(8) No(0)
• 4*2 =8
  4*6= 24
  4*15= 60
  4*31= 124
  4*56 =224 here difference of 6-2 = squ of 2,then 15-6 = squ of 3 ,so next one is squ of 4 so we can add 16 to 15 and get next series number...
• 9 years agoHelpfull: Yes(3) No(0)
• answer 124
  
  there are two series:
  4+(4*1^2)=8
  8+(4*2^2)=24
  24+(4*3^2)=60...
  and so on ..so finally we get 60+(4*4^2)=124
  and 124+(4*5^2)=224
• 9 years agoHelpfull: Yes(1) No(0)
• ans: 124
  difference is in this way 2^2,4^2,6^2,8^2,10^2
• 9 years agoHelpfull: Yes(0) No(0)
• you can apply the final weapon to beat it.
  The method is double difference.....
  do the diff. twice of the given sequence .... find the relation of bases..and finally add the last column..
  You can do it almost every sequence and you can get the ans
  
• 9 years agoHelpfull: Yes(0) No(0)