1,5,6 ,25, 26,30,31, 125,126,130,131,150,151,155,156,…………………
What is the value of 30th term in the given series?

• 1st term gives 2nd and 3rd term. .
  1st term* 5= 5(2nd term)
  2nd term +1=6(3rd term)
  multiply current position by 2 gives the position of term which is multiplied by no 5
  2nd term gives 4th and 5th term. .
  likewise check for others
  15th term gives 30th and 31st term. .
  ans:15th term*2=30th term
  so that 156*5=780(30th term)
  31st term is 780+1=781
• 11 years agoHelpfull: Yes(58) No(8)
• 780 is the correct ans
  pattern:
  1*5=5
  5,(5+1)=6 now take 5*5=(25,26) is the next pair
  now next no is 6. therefore,6*5=(30,31) next two no.
  similarly multiplying by 5 we get 780 as 30th num.
• 11 years agoHelpfull: Yes(23) No(2)
• 1,5,6 ,25, 26,30,31, 125,126,130,131,150,151,155,156,…………………
  
  1st yeilds 2nd and 3rd term. .
  1st term* 5= 5==(2nd term)
  2nd term +1=6==(3rd term)
  look at the no of jumps in the multiplication
  for 5 - 1 jump i.e. to 25
  for 6 - 2 jump i.e. to 30
  for 25 - 3 jump i.e. to 125 and so on... => 156 will jump 14 terms =>30th position => 156*5=780
• 11 years agoHelpfull: Yes(17) No(0)
• 3125
  1*5 = 5
  5+1 =6
  5*5 =25
  25+1 =26
  6*5 = 30
  30+1 =31
  25*5 =125
  125+1=126 ... n so on...u will gt d 30th term
  first 15 terms r given n cal so as 125* 5 = 625
  n 625*5= 3125
• 11 years agoHelpfull: Yes(8) No(19)
• 
  it is 3255
  
  3255?
  
• 11 years agoHelpfull: Yes(1) No(17)
• 625......take alternate nos...5/5,25/5,30/5,125/5.....155/5
  it will give answers = 1,5,6,25,26.....31.
  therefore the next term is x/5=125 means x=125*5 = 625
• 11 years agoHelpfull: Yes(1) No(15)
• 1st term: 5^0
  2nd term: 5^1
  3rd term: 5^1 + 1st term
  4th term: 5^2
  5th term: 5^2 + 1st term
  6th term: 5^2 + 2nd term
  7th term: 5^2 + 3rd term
  8th term: 5^3
  9th term: 5^3 + 1st term
  10th term: 5^3 + 2nd term
  ...
  16th term: 5^4
  17th term: 5^4 + 3rd term
  18th term: 5^4 + 4th term
  . . .
  30th term: 5^4 + 14th term = 625+155=780
• 9 years agoHelpfull: Yes(1) No(0)
• ans is 900
• 11 years agoHelpfull: Yes(0) No(15)
• correct answer is 3126 ; 5 power 5 + 1=3126
• 5 years agoHelpfull: Yes(0) No(0)