2,13,2,4,8,3,8,3,5,16.?

• Split into three sequences:
  First sequence: 2, 4, 8, 16 (1st, 4th, 7th, 10th element)
  Second sequence: 13, 8, 3, ? (2nd, 5th, 8th, 11th element)
  Third sequence: 2, 3, 5, ? (3rd, 6th, 9th, 12th element)
  
  We need the 11th element so we'll focus on second sequence. Here, we are subtracting -5 from every element. 13 -> 8 -> 3 -> -2. Our answer is -2.
• 8 years agoHelpfull: Yes(39) No(2)
• 3 seperate sequence
  2,13,2
  (2*2)4,8(13-5),3(2+1) from above series
  (4*2)8,3(8-5),5(3+2)
  (8*2)16,-2(3-5),8(5+3)
  
  So answer is -2,8
  
  
  
• 8 years agoHelpfull: Yes(17) No(3)
• There are 3 sequence
  2 13 2 4 8 3 8 3 5 16....
  2*2=4
  13-5=8
  2*2-1=3
  
  4*2=8
  8-5=3
  3*2-1=5
  
  8*2=16
  3-2=-2
  5*2-1=9
  
• 8 years agoHelpfull: Yes(3) No(5)
• 2,13,2 then 4
  8,3,8 then 3
  5,16,? is 5
• 7 years agoHelpfull: Yes(1) No(3)
• 0
  2--4--8--16
  13--8--5--0
• 7 years agoHelpfull: Yes(0) No(3)