Q. What is the next number of the following sequence
10, 12, 36, 7, 5, 15, 19, 21, ?

• 10+2=12,12*3=36
  7-2=5,5*3=15
  19+2=21,21*3=63
• 11 years agoHelpfull: Yes(18) No(0)
• 63... here we leave the 1st number and observe the third number it comes from 12*3=36 and 5*3=15 similarly 21*3=63..
• 11 years agoHelpfull: Yes(16) No(1)
• (10,12)->12*3=36
  (7,5)->5*3=15
  (19,21)->21*3=63
  so ans is 63
  
• 11 years agoHelpfull: Yes(3) No(1)
• leave of first no. , third no. divide by second no. and getting result 3
  so in final no will be 63 divide by 21 and getting similar result as 3
  
• 11 years agoHelpfull: Yes(2) No(1)
• 21*3=63..
  
  10+2=12, 12*3=36
  7-2=5, 5*3=15
  19+2=21, 21*3=63
• 11 years agoHelpfull: Yes(2) No(0)
• 10+2=12*3=36
  7-2=5*3=15
  19+2=21*3=63
• 11 years agoHelpfull: Yes(1) No(0)
• i think it as 57 bcz +2,*3,-2,*3,+2 done there so 19*3=57.
  isn't it ?
• 10 years agoHelpfull: Yes(0) No(0)