Q. What is the missing number of the following sequence
9, --, 15, 18, 21, 24

• 12
  
  It is increasing by 3.
  9 +3=12
  12 +3=15
  15 +3=18
  18 +3=21
  21 +3=24
  
  So, final sequence will be 9 ,12 ,15 ,18 ,21 ,24
• 12 years agoHelpfull: Yes(25) No(1)
• 12 common sense..
• 11 years agoHelpfull: Yes(5) No(2)
• the ans is 12 coz the common diff is 3.such a low level question.
• 10 years agoHelpfull: Yes(3) No(1)
• 9 ,-- , 15 , 18, 21, 24
  
  3*3,3*4, 3*5, 3*6, 3*7, 3*8
  
  so 3*4=12 is ans
• 10 years agoHelpfull: Yes(2) No(0)
• Ans will be 12.....
  
  3*3=9
  3*4=12
  3*5=15
  3*6=18
  3*7=21
  3*8=24
• 10 years agoHelpfull: Yes(2) No(0)
• Ans 12.
  9+3=12
  12+3=15
  15+3=18 and so on
• 10 years agoHelpfull: Yes(2) No(1)
• ans=12
  diff of sequence 12-9=3
  15-12=3
  18-15=3
  21-18=3
  24-21=3...
  
• 11 years agoHelpfull: Yes(1) No(0)
• 12 becoz difrence is 3
• 11 years agoHelpfull: Yes(1) No(0)
• Ans is=12
  1st=3*3=9
  2nd=3*4=12
  3rd=3*5=15
  4th=3*6=18
  .
  .
  .
• 10 years agoHelpfull: Yes(1) No(0)
• ALL ARE 3 MULTIPLIERS SO ANS 12
• 10 years agoHelpfull: Yes(1) No(0)
• multipels of 3 so answer is 12
• 10 years agoHelpfull: Yes(1) No(1)
• ....9
  9+3=12
  12+3=15
  15+3=18
  18+3=21
  21+3=24
  9, 12, 15, 18, 21, 24
• 10 years agoHelpfull: Yes(0) No(0)
• the difference between no's is 3,so the series will be 9+3=12
  
• 8 years agoHelpfull: Yes(0) No(0)