56,89,33,21,57,88,35,19,60,85,30,X

• the series look like
  56 89 33 21
  57 88 35 19
  60 85 30 X
  look here top down wise,
  56 + 1 = 57
  57 + 3 = 60
  89 - 1 = 88
  88 - 3 = 85
  33 + 2 = 35
  35 - 5 = 30
  21 - 2 = 19
  so,
  19 + 5 =24
  24 is the next X value
• 9 years agoHelpfull: Yes(16) No(3)
• 56 89 33 21
  57 88 35 19
  60 85 30 24
• 9 years agoHelpfull: Yes(1) No(1)
• ANS 24
  56 ,89, 33, 21 57,88,35,19 56=1=57,89-1=88,33+2=35,21-2=19
  +1-1,+2,-2
  57,88,35,19, 60,85,30,24 57+3=60,88-3=85,35-5=30,19+5=24
  +3,-3,-5,+5
  
• 9 years agoHelpfull: Yes(1) No(0)
• ANS=24
  56+1=57
  89-1=88
  33+2=35
  21-2=19
  57+3=60
  88-3=85
  35-5=30
  19+5=24(ANS)
• 8 years agoHelpfull: Yes(0) No(1)