5, 9, 12, 18, 26, 36, 47, 72, _?

• Ans:75
  Here In odd places, multiples of 7 are added i.e 5,5+7(=12),12+14(=26),26+21(=47),47+28(=75).
  Similarly for even numbers i.e multiples of 9 are added.
• 13 years agoHelpfull: Yes(47) No(0)
• 75 is the answer.
  1st sequence
  5
  5+7*1
  5+7*1+7*2
  5+7*1+7*2+7*3
  5+7*1+7*2+7*3+7*4=75 and next no. for even place,i.e.9,9*2,9*2*2,9*2*2*2,(9*2*2*2*2=144)
• 13 years agoHelpfull: Yes(11) No(4)
• there are 2 sequences
  that are
  5,12,26,47,_ the difference b?w nos is multiple of 7
  other is 9,18,36,72 is the multiple of 9
• 13 years agoHelpfull: Yes(3) No(2)
• its simple 12-5=7, 26-12=14 47-26=21 similarly 47+28 then 75
• 13 years agoHelpfull: Yes(2) No(2)
• answer is 75
• 13 years agoHelpfull: Yes(1) No(1)
• ans is 75....
  now take the odd terms....
  7^1-2=5
  7^2-2=12
  7^4-2=26
  7^7-2=47
  7^11-2=75....so on...
  
• 12 years agoHelpfull: Yes(1) No(1)
• consider it as two parts..
  1st part as 5,12,26,47
  2nd part as 9,18,36,72
  
  1st part as 5+7=12,12+14=26,26+21=47,47+28=75..(add the multiples of 7 to the number)
  2nd part as 9+9=18,18+18=36,36+36=72..(square of number)
  
  hence the next value is 75
  
  
• 9 years agoHelpfull: Yes(1) No(0)
• The sol given by Bhavesh is half correct.
  The odd part is correct but at even laces it is not the multiples of 9.
  The no. doubles itself eg 9 becomes 9*2=18
  18 becomes 18*2=36
  36 becomes 72 and so on....
• 12 years agoHelpfull: Yes(0) No(1)
• 75 In even Places, number is getting doubled and in odd places, a multiple of 7 is getting added.
• 6 years agoHelpfull: Yes(0) No(0)