Find the missing in the series:
70,54,45,41,____.

• 40
  70-54 = 16 = 4^2
  54-45 = 9 = 3^2
  45-41 = 4 = 2^2
  41-40 = 1 = 1^2
• 11 years agoHelpfull: Yes(38) No(1)
• 40
  70-54=16
  54-45=9
  45-41=4
  41-40=1
  
  
• 11 years agoHelpfull: Yes(5) No(0)
• its 40
  it is decreasing according to square like 16,9,4,1
  
• 11 years agoHelpfull: Yes(2) No(0)
• answer is 40.
  becoz
  70-4^2=54
  54-3^2=45
  45-2^2=41
  41-1^2=40.
  
• 11 years agoHelpfull: Yes(2) No(0)
• 41+2^2=45
  45+3^2=54
  54+4^2=70
  so, the ans will be 40.
• 11 years agoHelpfull: Yes(1) No(0)
• 70 - 4^2 =54
  54 - 3^2 =45
  45 - 2^2=41
  41 - 1^2=40
  so, 40 is the answer
• 11 years agoHelpfull: Yes(1) No(0)
• the next no is = the previous no - the square of 4,3,2 resp.
  hence the next no= 41-1^2=40
• 11 years agoHelpfull: Yes(1) No(0)
• differences 38
• 11 years agoHelpfull: Yes(1) No(2)
• Checking the differences, 16, 9, 4. These are all perfect squares. Thus the next difference will be 1 and the required number will be 40.
• 11 years agoHelpfull: Yes(1) No(0)
• 70-54=16=4^2
  54-45=9=3^2
  45-41=4=2^2
  41-40=1=1^2
• 11 years agoHelpfull: Yes(1) No(0)
• 70-54=16
  54-45=9
  45-41=4
  41-x=1
  hence x=40
• 11 years agoHelpfull: Yes(1) No(0)
• its 40 because it is adecending orger of substracting the squares of 4,3,2,1
• 11 years agoHelpfull: Yes(0) No(0)
• 40 as the difference between the numbers reduce in the fashion 4^2, 3^2, 2^2, 1^2
• 11 years agoHelpfull: Yes(0) No(0)
• 40,as the difference is in the form of squares of the number 1,2,3,4.
• 11 years agoHelpfull: Yes(0) No(0)
• 40.because each digit is differ by sqaures in order
• 11 years agoHelpfull: Yes(0) No(0)
• 
  70-54 = 16 = 4^2
  54-45 = 9 = 3^2
  45-41 = 4 = 2^2
  41-40 = 1 = 1^2
  so ns is 40
• 11 years agoHelpfull: Yes(0) No(0)
• 40
  differnece = squre of natural numbers in decreasing order.
• 11 years agoHelpfull: Yes(0) No(0)
• difference b/w them is in the order of16,9,4,1========4^2,3^2,2^2,1^2
  so the answer is 40.
• 11 years agoHelpfull: Yes(0) No(0)
• difference b/w them is in the order of16,9,4,1========4^2,3^2,2^2,1^2
  so the answer is 40.
• 11 years agoHelpfull: Yes(0) No(0)
• difference b/w them is in the order of16,9,4,1========4^2,3^2,2^2,1^2
  so the answer is 40.
• 11 years agoHelpfull: Yes(0) No(0)
• subtract 16 than 9,4 now 2
  so 39 is ans
• 11 years agoHelpfull: Yes(0) No(2)
• 70-54=16,54-45=9,45-41=4,41-1=40 it means square of 4.3,2 and 1 so adding 41-1=40
  ans: 40
• 11 years agoHelpfull: Yes(0) No(0)
• 70-4^2=54
  54-3^2=45
  45-2^2=41
  41-1^1=40
  so ans is 40
• 11 years agoHelpfull: Yes(0) No(0)
• answer is 40
• 11 years agoHelpfull: Yes(0) No(0)
• ans is 40
  
• 11 years agoHelpfull: Yes(0) No(0)
• Ans : 40 70-54=16(4^2)
  54-45=9(3^2)
• 6 years agoHelpfull: Yes(0) No(0)