-15,-14,34,32,-42,-39,58,54,-61,?

• -56
  diff between first 2 terms= 1
  diff between next two terms =2
  diff between next two terms =3
  diff between next two terms =4
  diff between next two terms will be 5.
  so next term will be -56.
• 11 years agoHelpfull: Yes(32) No(3)
• -15 +1=-14
  34 -2= 32
  -42 +3=-39
  58 -4= 54
  -61 +5=-56
  Ans=(-56)
  
• 11 years agoHelpfull: Yes(9) No(1)
• thank m4 maths
• 11 years agoHelpfull: Yes(2) No(0)
• it can be divided into groups of two from the beginning as (-15,-14);(34,32) and so on the first group has a difference of -1 then 2nd has diff of 2 ,3rd has diff of -3,4th has diff of -4 so last group should have a difference of -5.so the no. must be -56
• 11 years agoHelpfull: Yes(0) No(0)
• (-15,-14),(34,32),(-42,-39),(58,54),(-61,-54)ans
• 11 years agoHelpfull: Yes(0) No(4)
• ans=-56
  -15+1=-14
  34-2=32
  -42+3=-39
  58-4=54
  -61=5=-56
• 10 years agoHelpfull: Yes(0) No(0)
• answer is -56
• 10 years agoHelpfull: Yes(0) No(0)