What is the next number of the following sequence?
3,6,13,26,33,66,...

• 73
  Multiply by 2 and Add 7
  [3*2=6],[6+7=13],[13*2=26],[26+7=33],[33*2=66],[66+7=73]
• 10 years agoHelpfull: Yes(50) No(7)
• answer:63
  divide given series into 2 parts
  3,13,33(difference in series-10,20,30..... etc)
  6,26,66
  so answer is 63
• 10 years agoHelpfull: Yes(27) No(8)
• 3,6--> 3*2 = 6
  13,26--> 13*2=26
  33,66--> 33*2=66
  as diff between 3,13,33... is 10, 20,30....
  so answer is 33+30=63 nd next number is 63*2=126
  hence the series is 3,6,13,26,33,66,63,126.......
  
• 10 years agoHelpfull: Yes(16) No(3)
• 3*2=6+7=13
  13*2=26+7=33
  33*2=66+7=73
• 10 years agoHelpfull: Yes(7) No(0)
• 63...3,3*2=6,13,13*2=26,33,33*2=66....the difference between 3,13,33...is 10,20...next differnce should be 30 which is 33+30=63
• 10 years agoHelpfull: Yes(5) No(5)
• 73...
  3+10=13+20=33+40=73
• 10 years agoHelpfull: Yes(4) No(1)
• 3*2=6
  6+7=13
  13*2=26
  26+7=33
  33*2=66
  66+7=73
  S
  Therefore, 73 is the answer
• 10 years agoHelpfull: Yes(3) No(1)
• In each pair the second number is obtaind by the multiplication of 2 with first number.The difference between the pair of numbers is 7.so the next number is 73(answer)
• 10 years agoHelpfull: Yes(3) No(0)
• odd 3,13,33
  even 6,26,66
  3*2+7 = 13
  13*2+7 = 33
  33*2+7 = 73
  so ans is 73
• 10 years agoHelpfull: Yes(3) No(0)
• 63, look at odd terms they r increasing in manner +10, +20, +30
  
• 10 years agoHelpfull: Yes(2) No(2)
• (3*2=6)+7=13
  (13*2=26)+7=33
  (33*2=66)+7=73
  therefore the answer is 73
• 10 years agoHelpfull: Yes(2) No(1)
• 63 bcoz difference is 10,20,30 etc
• 10 years agoHelpfull: Yes(2) No(4)
• answer=73
  3*2=6,6+7=13,13*2=26,26+7=33,33*2=66,66+7=73
• 10 years agoHelpfull: Yes(2) No(0)
• yes the ans is 63
• 10 years agoHelpfull: Yes(1) No(5)
• 63
  3+10=13
  13+20=33
  33+30=63
• 10 years agoHelpfull: Yes(1) No(2)
• Ans=133
  because 6=3*2,
  13=(6*2)+1,
  26=13*2,
  33=(26*2)+1,
  66=33*2,
  133=(66*2)+1
  so alternatively 1 is added to the twice of the previous number.
• 10 years agoHelpfull: Yes(1) No(5)
• 73....
  multiple 2 then add 7......
  66+7=73...
  ans) 73
• 10 years agoHelpfull: Yes(1) No(0)
• here,the second term is double of the first term i.e its previous term.
  i.e 3*2=6
  and we get the third term by adding 7 with the second term i.e its previous term.
  i.e 6+7=13
  so, in this way we get the even term by multiplying by 2 of its previous term
  i.e 13*2=26
  and get the odd term by adding 7 with its previous term.
  i.e 26+7=33
  
  so, the next term will be 66+7=73 (since its a odd term)
  73 is the answer.
• 10 years agoHelpfull: Yes(1) No(0)
• 3,6,13,26,33,66, is the series
  there are two series actually 1) 3,13,33,.. 2) 6,26,66,..
  1) 3,13,33,..
  the difference in 1st series is as 10,20,30, etc
  so the series will continue as 3,13,33,63,103,..
  2) 6,26,66,..
  the difference in the 2nd series is as 20,40,60,80,etc
  so the series continues as 6,26,66,126,206,etc
  
  thus the final series is 3,6,13,26,33,66,63,126,103,206.
• 10 years agoHelpfull: Yes(1) No(1)
• 3x2=6
  13x2=26
  33x2=66
  
  Then we have
  6 26 66
  3--(+10)-->13--(+20)-->33--(+30)-->63
• 10 years agoHelpfull: Yes(1) No(0)
• 3, 3*2=6, 3+10=13, 13*2,13+20=33, ..
  so the next number is 33+30=63
• 10 years agoHelpfull: Yes(0) No(2)
• answer is 63
• 10 years agoHelpfull: Yes(0) No(4)
• answer is 73.
  Explanation :
  the series is:
  first number=3;
  2nd = 1st*2
  3rd=2nd+7
  4th = 3rd*2
  5th= 4th+7............and continues..
• 10 years agoHelpfull: Yes(0) No(0)
• 73
  Multiply by 2 and Add 7
• 10 years agoHelpfull: Yes(0) No(0)
• its 123.
  first digit is coming alternatively 3 and 6.
  second digit is the summation of second digits of previous numbers
• 10 years agoHelpfull: Yes(0) No(1)
• 73 bcoz
  3 * 2 = 6 + 7 = 13 * 2= 26 +7 = 33 *2 = 66+7= 73
• 10 years agoHelpfull: Yes(0) No(0)
• 3,(3*2),(6+7),(13*2),(26+7),(33*2),(66+7)
  therefore 73 is the answer....
• 10 years agoHelpfull: Yes(0) No(0)
• ans:63
  the difference of odd series increase by multiples of 10(ie.+10,+20,+30,...etc)
  the diff. of even series increases by multiples of 20(ie.+20,+40,...etc)
• 10 years agoHelpfull: Yes(0) No(0)
• rgt answr is 73
  3,13,33 ....
  3+10=13,13+20=33,33+40=73....(10*2=20,20*2=40....)
• 10 years agoHelpfull: Yes(0) No(0)
• 73
  Multiply by 2 and Add 7
  [3*2=6],[6+7=13],[13*2=26],[26+7=33],[33*2=66],[66+7=73]
• 10 years agoHelpfull: Yes(0) No(1)
• 73
  3*2 =6
  6+7 =13
  13*2 =26
  26+7 =33
  33*2 =66
  66+7 =73
• 10 years agoHelpfull: Yes(0) No(1)
• its 73..the series follows 3,2*3,(2*3)+7,2*[(2*3)+7]...
• 10 years agoHelpfull: Yes(0) No(0)
• series is in two parts, 3,13,33,.... and 6,26,66
  3,13,33 have difference as 10,20 the next would be 20 more.. i.e 33+40=73
  it can be confirmed by looking at 6,26,66 as difference is 20,40 means doubling the initial value.
  so 73 would be answer
• 10 years agoHelpfull: Yes(0) No(0)
• 3*2=6 and add dat 7 t0 6 will get 13
  13*2=26 ,add 26+7=33
  33*2=66,add 66+7=73
  73*2=146
• 10 years agoHelpfull: Yes(0) No(0)
• ans is 66+7=73
• 10 years agoHelpfull: Yes(0) No(0)
• ans 63
  3+10=13
  13+20=33
  33+30=63
• 10 years agoHelpfull: Yes(0) No(0)
• that no is 73
  
• 10 years agoHelpfull: Yes(0) No(0)
• 3*2=6
  6+7=13
  13*2=26
  26+7=33
  33*2=66
  66+7=73
  
• 10 years agoHelpfull: Yes(0) No(0)
• 3*2 = 6, 13*2 = 26, 33*2 = 66 hence 66*2 = 132 and hence the answer.
• 10 years agoHelpfull: Yes(0) No(1)
• 3
  3*2=6
  3+10=13
  13*2=26
  13+20=33
  33*2=66
  33+30=63 =Ans
  similarly 2*63=126
  so no. after 66 will be 63
  Ans=63
  
  
• 10 years agoHelpfull: Yes(0) No(0)
• 3*2 = 6 => 6+7 = 13
  13*2 = 26 => 26+7 = 33
  33*2 = 66 => 66+7 = 73
• 5 years agoHelpfull: Yes(0) No(0)