Q. What is the next number of the following sequence
1,-1,2,-6,2,-2,4,-12,3,?

• each term in the series multiplied by -1 and -3 alternately
  1*-1=-1
  2*-3=-6
  2*-1=-2
  4*-3=-12
  3*-1=-3
  ans is -3
• 11 years agoHelpfull: Yes(17) No(4)
• 1*(-1)=-1
  2*(-3)=-6
  2*(-1)=-2
  4*(-3)=-12
  3*(-1)=-3
• 11 years agoHelpfull: Yes(6) No(0)
• (1,-1) so 1-1=0
  (2,-6) so 2-6=4
  (2,-2) so 2-2=0
  (4,-12) so 4-12=8
  (3,x) so 3+x=0
  put the value of x is -3
  (3,-3) so 3-3=0
  so ans is -3
  
• 11 years agoHelpfull: Yes(3) No(0)
• 1*(-1)=-1
  2*-(-3)=-6
  2*(-1)=-2
  4*(-3)=-12
  3*(-1)=-3
• 11 years agoHelpfull: Yes(1) No(0)
• 1-1=0,2-6=-4,2-2=0,4-12=-8,3-x=0
  So the answer is -3
• 11 years agoHelpfull: Yes(0) No(0)
• the next sequence is -3,6,18
• 11 years agoHelpfull: Yes(0) No(0)
• Answer is -3
• 11 years agoHelpfull: Yes(0) No(0)
• 1,2,2,4,3......
  -1,-6,-2,-12,?
  -1*2=-2
  -6*2=-12
  -2*2=-4
• 11 years agoHelpfull: Yes(0) No(0)