find out the wrong number in the given sequence of numbers
15,16,34,105,424,2124,12756

• 15*1+1=16
  16*2+2=34
  34*3+3=105
  105*4+4=424
  424*5+5=2125
  2125*6+6=12756
  wrong number is 2124
• 8 years agoHelpfull: Yes(5) No(2)
• answer is 2124 so this series it should be replace by 2125
• 7 years agoHelpfull: Yes(0) No(1)
• wrong answer is 2124 because 424*5+5=2125
• 7 years agoHelpfull: Yes(0) No(0)
• 2nd term = (1st term) x 1 + 1 = 15 x 1 + 1 = 16.
  
  3rd term = (2nd term) x 2 + 2 = 16 x 2 + 2 = 34.
  
  4th term = (3th term) x 3 + 3 = 34 x 3 + 3 = 105.
  
  5th term = (4th term) x 4 + 4 = 105 x 4 + 4 = 424
  
  6th term = (5th term) x 5 + 5 = 424 x 5 + 5 = 2125
  
  6th term should 2125 instead of 2124.
• 7 years agoHelpfull: Yes(0) No(0)