What is the next number of the following sequence
3,5,6,10,9,15,12,_____

• there are two series with alternate terms
  (3,6,9,12,15 ) & (5,10,15,20)
  so next two numbers are 20,15
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• odd places no+3
  even places no+5
  next term=15 20
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• next terms 20,15
  odd places=before odd place number+3, even places=before even place number +5.
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• for odd places add 3
  even places add5
  so next number is 20
  
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• 
  Ans is 20
  Multiplication going alternate ... 3_6(3*2)_9(3*3)_12(3*4)_
  same way with 5_10(5*2)_15(5*3)_20(5*4)
  
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• 3,5,6,10,9,15,12,20
  there is two table of 3 and 5
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• the alternate numbers are changing in a pattern
  3,6,9,12,
  5,10,15 ,_
  the numbers in second group are changing in +5 order
  ans 15+5=20
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• 20 it's in series of table 5
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• 
  there are two series with alternate terms
  (3,6,9,12,15 ) & (5,10,15,20)
  so next two numbers are 20,15
  
  
• 10 years agoHelpfull: Yes(0) No(0)
• 3+3=6+3=9+3=12+3=15
  5+5=10+5=15+5=20
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• Even places are incresed by 5 so answer is 20
• 4 years agoHelpfull: Yes(0) No(0)