Q. What is the next number of the following sequence
2,1,3,4,3,5,6,5,7,8,...

• 2,1,3,4,3,5,6,5,7,8,?
  take the difference between 2nd and 1st digit and go on....
  (i.e.,) 1-2=-1, 3-1=2, 4-3=1.... if u go on doing, the difference will be in the series "-1,2,1". Hence the last 3 digits will be 2,1,3,4,3,5,6,5,7,8,"7,9,10"
• 11 years agoHelpfull: Yes(0) No(0)