# Missing number

What is the missing number in this series? 8 2
14 6 11? 14 6 18 12
This question is related to Accenture Interview Profile Answers by rkpadki Questions by rkpadki

• Member Since Feb-2008 | Feb 25th, 2008

Hi,

I came up with another thought...

the numbers are 8,2,14,6,11,?,14,6,18,12
Now add the 1st number and the last number .. it is 20.
not add the 2nd number which is 2 and the last but one number which is 18 ... it is 20..
So if you keep adding these all the sum equals to 20. So the number next to 11 should be 9. Any thoughts :-)

#### ramyaac Profile Answers by ramyaac

• Feb 24th, 2008

The missing number is 5!! the given numbers r:
8,2,14,6,11,?,14,6,18,12
Now...
8-6=2.
14-8=6.
again..after the missing number 14-8=6 n 18-6=12!
And so the missing number shuld be 11-6=5!!
Hopefully the answer is 5...if any body comes up wid another answer..plz do post it!!

#### rkpadki Profile Answers by rkpadki

• Feb 25th, 2008

Hi,

I came up with another thought...

the numbers are 8,2,14,6,11,?,14,6,18,12
Now add the 1st number and the last number .. it is 20.
not add the 2nd number which is 2 and the last but one number which is 18 ... it is 20..
So if you keep adding these all the sum equals to 20. So the number next to 11 should be 9. Any thoughts :-)

#### mrbhush Profile Answers by mrbhush

• Mar 25th, 2008

8,2, 14,6, 11,?, 14,6, 18,12

here we can see the difference between pairs...
in first pair : 8-2=6 then
14-6=8

11-?= 11-21=10

14-6=8
18-12=6.

#### mrbhush Profile Answers by mrbhush

• Mar 25th, 2008

sorry, 21 s worng.

#### shyaamsundar Profile Answers by shyaamsundar

• Apr 11th, 2008

8+12=20
2+18=20
14=6=20
6+14=20
11+x=20

adding the first and the last no
addind the second and the last but one and so on....

#### anand3186 Profile Answers by anand3186

• Jul 16th, 2009

8  ,  2  ,  14  ,  6  ,  11  ,  ?  ,  14  ,  6  ,  18  ,  12

-6   +12    -8    +5           (*)    -8   +12   -6

Following the series, (*) has to be +5 . . .

So, ? + 5 = 14.

the missing no is 9.

#### johny007smart Profile Answers by johny007smart

• Nov 11th, 2009

8+12=20
2+18=20
14+6=20
6+14=20
11+9=20

#### muhammedkareem321 Profile Answers by muhammedkareem321

• Feb 1st, 2010

First one is right. If you see the sum of first and last is 20. you will get this for all the numbers give in the question. So the missing number must be 9

Given number are 8, 2, 14, 6, 11, ?, 14, 6, 18, 12

8+12=20
2+18=20
14+6=20
6+14=20
11+?=20
=>20-11=9

Many thanks
Muhammed Kareem

#### muhammedkareem321 Profile Answers by muhammedkareem321

• Feb 1st, 2010

21 will not be a best answer as per the rules in maths, your number cross the limit. The max number which you can get is >13. Kindly check the question once again and analyze the number given. you will understand.

Hope, it make some sense to you

Many thanks
Muhammed Kareem

#### prititripathi Profile Answers by prititripathi

• Feb 25th, 2011

sumo f first n last digit is 20

similarly second last n second no. sum=20
so missing no. vll b 9

• Aug 17th, 2011

#### Guru

• Aug 20th, 2011

Add the first and last number(i.e 8+12=20)

And add the second number and the number which second from last(i.e 2+18)

And so on............

Now the required answer is 9 (i.e 11+9=20)

#### Sravani

• Aug 26th, 2011

Ya your thought is right.but it can b done like this.
the series is 8 2 14 6 11 ? 14 6 18 12
here we can tabulate as folows
frm front frm back
Diff (8,2) = 6 Diff (12,18) = 6
Diff (14,6) = 12 Diff (18,6) = 12
Diff (6,11) = 5 Diff (14,?) = 5
=> 14-5=9  