Latest Infosys Aptitude Question SOLUTION: What is the next number of the following sequence? 3,6,13,26,33,66,...

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

Asked In Infosys chithra nair (10 years ago)

Unsolved Read Solution (41)

Is this Puzzle helpful?   (27)   (8) Submit Your Solution Number Series

Read Solution (41) :

Devendra Marghade  (10 years ago)

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]

Is this solution Helpfull? Yes (50) | No (7)  

phani  (10 years ago)

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

Is this solution Helpfull? Yes (27) | No (8)  

pranitha karnati  (10 years ago)

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.......

Is this solution Helpfull? Yes (16) | No (3)  

Shashank gupta  (10 years ago)

3*2=6+7=13
13*2=26+7=33
33*2=66+7=73

Is this solution Helpfull? Yes (7) | No   

bhavya sri  (10 years ago)

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

Is this solution Helpfull? Yes (5) | No (5)  

baibhav jena  (10 years ago)

73...
3+10=13+20=33+40=73

Is this solution Helpfull? Yes (4) | No (1)  

Sakshi  (10 years ago)

3*2=6
6+7=13
13*2=26
26+7=33
33*2=66
66+7=73
S
Therefore, 73 is the answer

Is this solution Helpfull? Yes (3) | No (1)  

sivaranjanjani  (10 years ago)

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)

Is this solution Helpfull? Yes (3) | No   

atuljain  (10 years ago)

odd 3,13,33
even 6,26,66
3*2+7 = 13
13*2+7 = 33
33*2+7 = 73
so ans is 73

Is this solution Helpfull? Yes (3) | No   

gaurav  (10 years ago)

63, look at odd terms they r increasing in manner +10, +20, +30

Is this solution Helpfull? Yes (2) | No (2)  

chandana  (10 years ago)

(3*2=6)+7=13
(13*2=26)+7=33
(33*2=66)+7=73
therefore the answer is 73

Is this solution Helpfull? Yes (2) | No (1)  

arun prakash singh  (10 years ago)

63 bcoz difference is 10,20,30 etc

Is this solution Helpfull? Yes (2) | No (4)  

julee verma  (10 years ago)

answer=73
3*2=6,6+7=13,13*2=26,26+7=33,33*2=66,66+7=73

Is this solution Helpfull? Yes (2) | No   

chithra nair  (10 years ago)

yes the ans is 63

Is this solution Helpfull? Yes (1) | No (5)  

Rinki  (10 years ago)

63
3+10=13
13+20=33
33+30=63

Is this solution Helpfull? Yes (1) | No (2)  

B.Rajesh  (10 years ago)

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.

Is this solution Helpfull? Yes (1) | No (5)  

kalyan ram  (10 years ago)

73....
multiple 2 then add 7......
66+7=73...
ans) 73

Is this solution Helpfull? Yes (1) | No   

Sajib Ghosh  (10 years ago)

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.

Is this solution Helpfull? Yes (1) | No   

Sindu  (10 years ago)

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.

Is this solution Helpfull? Yes (1) | No (1)  

Soumyabrata Sarkar  (10 years ago)

3x2=6
13x2=26
33x2=66

Then we have
6 26 66
3--(+10)-->13--(+20)-->33--(+30)-->63

Is this solution Helpfull? Yes (1) | No   

Obularaju  (10 years ago)

3, 3*2=6, 3+10=13, 13*2,13+20=33, ..
so the next number is 33+30=63

Is this solution Helpfull? Yes | No (2)  

anitha  (10 years ago)

answer is 63

Is this solution Helpfull? Yes | No (4)  

piyush  (10 years ago)

answer is 73.
Explanation :
the series is:
first number=3;
2nd = 1st*2
3rd=2nd+7
4th = 3rd*2
5th= 4th+7............and continues..

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anudeep  (10 years ago)

73
Multiply by 2 and Add 7

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LOGESWARIBHOOPALAN  (10 years ago)

its 123.
first digit is coming alternatively 3 and 6.
second digit is the summation of second digits of previous numbers

Is this solution Helpfull? Yes | No (1)  

Satyendra Singh  (10 years ago)

73 bcoz
3 * 2 = 6 + 7 = 13 * 2= 26 +7 = 33 *2 = 66+7= 73

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Saravana Ganesh  (10 years ago)

3,(3*2),(6+7),(13*2),(26+7),(33*2),(66+7)
therefore 73 is the answer....

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MAHALAKKSHMI S  (10 years ago)

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)

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rakhi kumari  (10 years ago)

rgt answr is 73
3,13,33 ....
3+10=13,13+20=33,33+40=73....(10*2=20,20*2=40....)

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shahil alam  (10 years ago)

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]

Is this solution Helpfull? Yes | No (1)  

shubham  (10 years ago)

73
3*2 =6
6+7 =13
13*2 =26
26+7 =33
33*2 =66
66+7 =73

Is this solution Helpfull? Yes | No (1)  

VARSHAKRISHNAN  (10 years ago)

its 73..the series follows 3,2*3,(2*3)+7,2*[(2*3)+7]...

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Himanshu upadhyay  (10 years ago)

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

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varshika  (10 years ago)

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

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himani  (10 years ago)

ans is 66+7=73

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prabha  (10 years ago)

ans 63
3+10=13
13+20=33
33+30=63

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disha  (10 years ago)

that no is 73

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senthilkumar sivraman  (10 years ago)

3*2=6
6+7=13
13*2=26
26+7=33
33*2=66
66+7=73

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chandra prakash  (10 years ago)

3*2 = 6, 13*2 = 26, 33*2 = 66 hence 66*2 = 132 and hence the answer.

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Shreya Nama  (10 years ago)

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

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Komati Raju  (5 years ago)

3*2 = 6 => 6+7 = 13
13*2 = 26 => 26+7 = 33
33*2 = 66 => 66+7 = 73

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