Find the wrong number below mentioned series
5,24,60,120,210,340
Option
a) 340
b) 210
c) 5
d) 60

• I guess question might be wrong...
  There are 2 wrong numbers are here...
  
  24 --> 3^3 - 3
  60 --> 4^3 - 4
  120 -> 5^3 - 5
  210 -> 6^3 - 6
  
  340 should be 7^3 - 7 = 343 - 7 = 336
  5 should be 2^3 - 2 = 8 - 2 = 6
  
  
  So Wrong number is 340 nd 5
  
  Ans : (a), (c)
• 10 years agoHelpfull: Yes(17) No(0)
• (c) 5
  
  5 is the only prime number or odd number in the series.
• 10 years agoHelpfull: Yes(5) No(0)
• Else it might be 340
  
  (5, 60, 210) (24, 120, 340)
  1st group is divisible by "5"
  2nd group should be divisible by "24"
  
  but 340 is not divisible by "24"
  
  So ans might be 340
  
• 10 years agoHelpfull: Yes(4) No(0)
• question is right
• 10 years agoHelpfull: Yes(0) No(0)
• i think
  4*1^2+1=5
  5*2^2+4=24
  6*3^2+6=60
  7*4^2+8=120
  8*5^2+10=210
  9*6^2+12=336
  
  
  so ans is -a
• 10 years agoHelpfull: Yes(0) No(2)