Q. What is the next number of the following sequence

1) 4,11,66,74,370,379,........

2) -51,-11,23,29,17,-20,-14,.......

• 2) series should be
  -5, 1, -11, 23, 29, 17, -20, -14,...
  (-5, 1, -11),( 23, 29, 17), (-20, -14, x)
  
  -5+6=1, 1-12=-11
  23+6=29, 29-12=17
  -20+6=-14, -14-12=x => x = -26
• 10 years agoHelpfull: Yes(31) No(0)
• 1) 4,11,66,74,370,379,....
  (4,11),(66,74),(370,379),(x,y)
  11-4=7, 11*6=66
  74-66=8, 74*5=370
  379-370=9, 379*4=1516 => x=1516
  y-1516=10 => y=1526
• 10 years agoHelpfull: Yes(23) No(4)
• 1) 4(+7)11(x6)66
  66(+8)74(x5)370
  370(+9)379(x4)1516
  
  Observe that the addition follows +1 and multiplication follows -1.
• 10 years agoHelpfull: Yes(6) No(0)
• 1)series follows the pattern
  +7,*6,+8,*5,+9,*4,+10,*3.........
  so next term should be 1516.
• 10 years agoHelpfull: Yes(0) No(0)