Find the 8th term in sries?

2,2,12,12,30,30,.........

• 1^1+1=2
  2^2-2=2
  3^2+3=12
  4^2-4=12
  5^2+5=30
  6^2-6=30
  
  so next two 7th=(7^2+7)=56 & 8th=(8^2-8)=56
  
  ans 56
• 10 years agoHelpfull: Yes(98) No(9)
• answer is 56.
  
  given series is 2, 2, 12, 12, 30, 30,........
  
  we know about the natural numbers 1, 2, 3, 4,.....
  so, the series works in following way.
  
  1 * 2 = 2
  2 * 1 = 2
  3 * 4 = 12
  4 * 3 = 12
  5 * 6 = 30
  6 * 5 = 30
  7 * 8 = 56
  8 * 7 = 56
  
  so its simple and our required ans is 56.
• 10 years agoHelpfull: Yes(79) No(5)
• Look upon the series carefully
  2,2,12,12,30,30,.........
  
  1^1 + 1 = 2
  2^2 - 2 = 2
  3^2 + 3 = 12
  4^2 - 4 = 12
  5^2 + 5 = 30
  6^2 - 6 = 30
  Similarly
  7th term will be(7^2+7)=56 &
  8th term will be(8^2-8)=56
  
  answer will be 56
  
  
• 10 years agoHelpfull: Yes(17) No(1)
• 1*2=2
  3*4=12
  5*6=30 so the 8th term will be
  7*8=56.
• 10 years agoHelpfull: Yes(9) No(2)
• Answer is 56
  
  1x2=2
  2x1=2
  3x4=12
  4x3=12
  5x6=30
  6x5=30
  so now 7x8=56
• 10 years agoHelpfull: Yes(6) No(0)
• 1x2=2
  2x1=2
  3x4=12
  4x3=12
  5x6=30
  6x5=30
  similarly
  7x8=56
• 10 years agoHelpfull: Yes(4) No(1)
• First it is repeated and then incremented by 10,18,26..lyk dat
• 10 years agoHelpfull: Yes(3) No(0)
• consider even terms..
  so that we get.,
  write all the terms twice..
  2^2-2=2
  4^4-4=12
  6^6-6=30
  8^8-8=56
• 10 years agoHelpfull: Yes(2) No(1)
• 1*2 = 2
  2*1 = 2
  2*6 = 12
  6*2 = 12
  3 * 10 = 30
  10*3= 30
  4 * 14 = 56
  14 * 4 = 56
  5 * 18 = 90
  18 * 5 = 90
  thereforem 8th term is 56
  
• 10 years agoHelpfull: Yes(1) No(4)
• it vl be 56
• 10 years agoHelpfull: Yes(1) No(0)
• 2,2,12,12,30,30,40,40......can be
  as sum of 1st and 8th is equal to sum of 2nd and 7th ....and so on!!!
  
• 10 years agoHelpfull: Yes(1) No(1)
• 56 because the series is incremented by 10, 18, 26 and incremented takes place after two same no.
• 10 years agoHelpfull: Yes(1) No(0)
• 1^1+1=2
  2^2-2=2
  3^2+3=12
  4^2-4=12
  5^2+5=30
  6^2-6=30
  
  so next two 7th=(7^2+7)=56 & 8th=(8^2-8)=56
  
  ans 56
• 10 years agoHelpfull: Yes(1) No(0)
• 1x2=2
  2x1=2
  3x4=12
  4x3=12
  5x6=30
  6x5=30
  similarly
  7x8=56
  
• 10 years agoHelpfull: Yes(1) No(0)
• 1^2+1=2....repeat
  3^2+3=12...
  5^2+5=30...
  7^2+7=56...
  so ans is 56
• 10 years agoHelpfull: Yes(1) No(0)
• 2+(2*5)=12;
  12+(3*6)=30;
  30+(4*7)=58;
  so, ans is 58.
• 10 years agoHelpfull: Yes(0) No(2)
• answer 56(7^2+7)=56 & 8th=(8^2-8)=56
• 10 years agoHelpfull: Yes(0) No(0)
• 56,56 will be answer 7^7+7=56
• 10 years agoHelpfull: Yes(0) No(0)
• 4^2 6^2 10^2 18^2
  4 6 10 difference is 2 and 4 so again 2 and 4 is in 2*2 so next term is 4 and again from that next series is 4*2 so 8 and again 8*2=16 therefore 18+16=34 and is 34^2 gives 1156.
• 9 years agoHelpfull: Yes(0) No(1)
• 56
  1*2=2
  3*4=12
  5*6=30
  7*8=56
• 4 years agoHelpfull: Yes(0) No(0)
• The answer is 56
• 4 years agoHelpfull: Yes(0) No(0)