Latest Infosys Aptitude Question SOLUTION: 7th number in the series.... 99,18,36,9,18

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(#M40157407) INFOSYS Logical Reasoning question Series Keep an EYE

7th number in the series....
99,18,36,9,18

Asked In Infosys R.LAKSHMI PRASANNA SAI (8 years ago)

Unsolved Read Solution (26)

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Read Solution (26) :

haritha  (8 years ago)

its 7 th number in the series 99,18,36,9,18,_,?

99 18.....9+9=18*2=36
36 9.......3+6=9*2=18
18 ?........1+8=9*2=18
ans is 18

Is this solution Helpfull? Yes (41) | No (10)  

guntupally Nagavasu  (8 years ago)

99 18.....9+9=18*2=36
36 9.......3+6=9*2=18
18 ?........1+8=9*2=18

so answer is 9

Is this solution Helpfull? Yes (18) | No (16)  

Rohan Johari  (8 years ago)

18 is the ans.
exp:-
9+9=18
18*2=36
3+6=9
9*2=18
1+8=9
9*2=18
hence the ans is 18

Is this solution Helpfull? Yes (12) | No (3)  

somnath paul  (8 years ago)

its 7th no. so be carefull while solving. answer is 18

Is this solution Helpfull? Yes (7) | No (2)  

Tathagata Majumdar  (8 years ago)

99 gives 9+9=18 (2nd no.)
next 18x2=36 (3rd no.)
next 3+6=9 (4th no.)
next 9x2=18 (5th no.)
next 1+8=9 (6th no.)
next 9x2=18 (7th no.)

Is this solution Helpfull? Yes (6) | No   

gurudev pawar  (8 years ago)

99 18 . . . 9+9 = 18
36 9 . . . 3+6 = 9
18 ? . . . .1+8 = 9

So I'm going with 9.

Is this solution Helpfull? Yes (5) | No (6)  

sai  (8 years ago)

99,9+9,36,3+6,9,1+8,9

Is this solution Helpfull? Yes (3) | No (4)  

vivek singh  (8 years ago)

9+9=18
18*2=36
3+6=9
9*2=18
1+8=9
9*2=18

Is this solution Helpfull? Yes (3) | No   

ashish  (8 years ago)

9+9=18*2=36=3+6=9*2=18=1+8=9


hence answer is 9

Is this solution Helpfull? Yes (2) | No (5)  

Riy Uplenchwar  (8 years ago)

Answer is 1 as 7th term is asked in que....

99 18 36 9 18 9 18

Is this solution Helpfull? Yes (1) | No   

anildudhate  (8 years ago)

its 7 th number in the series 99,18,36,9,18,_,?
for second term add first term two digits separately and for third term multiple with 2 to second term repeat the process till you get 7th term

Is this solution Helpfull? Yes (1) | No   

Nischal  (8 years ago)

9+9 = 18
18*2=36
3+6=9
9*2=18
1+8=9
9*2=18

99,18,36,9,18,9,18

Is this solution Helpfull? Yes (1) | No   

yash kamdar  (8 years ago)

99 =9+9=18
36=3+6=9
18=1+8=9
therefore solution is 9

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

Amandeep  (7 years ago)

Sum of numbers of 1st term gives 2nd term ie, 9+9=18, and then 2nd term multiplied by 2 gives 3rd term, ie, 18*2=36, then sum of numbers of 3rd term gives 4th term, then 4th term times 2 gives 5th term, then sum of numbers of 5th term gives 6th term and then 6th term multiplied by 2 gives 7th term. So 7th term is 18

Is this solution Helpfull? Yes (1) | No   

raaj  (7 years ago)

9 because first term is the addition of digit and second term is multiply by 2 of it
example first term is 99 so second term is addition of digit 9+9=18
third term is obtained by multiplying by 2 18*2=36
similarly

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

raaj  (7 years ago)

9 since first term is 99 we can see that second term is the sum of digit of first and third is 2 multiple of second similarly eg
99 so second 9+9=18
third 2*18=36
fourth=3+6=9

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

BATHULA HARITHA  (6 years ago)

18
9+9=18
18*2=36
3+6=9
9*2=18
1+8=9
9*2=18

Is this solution Helpfull? Yes (1) | No   

Seema Madhukar Jadhav  (6 years ago)

9+9=18
18*2=36
3+6=9
9*2=18
1+8=9
9*2=18
7th number=18

Is this solution Helpfull? Yes (1) | No   

ARAVIND  (8 years ago)

18
9+9:18, 18*2:36
3+6:9, 9*2:18
1+8:9,9*2:18

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MITKARI.SUNIL  (8 years ago)

It is dual series sum of first series is the 2nd series

Is this solution Helpfull? Yes | No (1)  

Avanti  (8 years ago)

7 th no is asked so ans is 18..6th no will be 9

Is this solution Helpfull? Yes | No (1)  

SANDIP KUMAR PASWAN  (8 years ago)

99,18,36,9,18,9,0

Is this solution Helpfull? Yes | No (2)  

mitali  (7 years ago)

99 18..... 9+9=18*2=36
99 18 36....... 1+8=9*1=9
99 18 36 9...... 3+6=9*2=18
99 18 36 9 18 .......9+0=9*1=9
99 18 36 9 18 9...

so the ans is 9

Is this solution Helpfull? Yes | No (1)  

Dinne Aajay Kumar  (7 years ago)

the answer is 9

Is this solution Helpfull? Yes | No (1)  

Abhilipsa  (7 years ago)

answer is 9

Is this solution Helpfull? Yes | No (1)  

Ravi Shankar Singh  (6 years ago)

99 - 81 = 18
18 * 2 = 36
36 - 27 = 9
9 * 2 = 18
18 - 9 = 9

Gonna go with 9.

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