Dr.Dipin Singh   13 years AGO

4, 12, 6, 18, 9, 27, ......

4*3=12
12/2=6
6*3=18
18/2=9
9*3=27
next number is 27/2 =13.5

Nos at Even positions are obtained by multiplying previous no by 3
and
Nos at odd positions are obtained by dividing previous no by 2.

Like? Yes (10) | No (2)  

ashokkumar   13 years AGO

4+4/2=4+2=6
6+6/2=6+3=9
9+9/2=9+4.5=13.5

Like? Yes (3) | No   

shyoram Gurjar   13 years AGO

A series as

4*3=12 12/2=6
6*3=18 18/2=9
9*3=27 27/2=13.5 Ans option 3

Like? Yes (3) | No (1)  

lakshmi reddy   13 years AGO

4*3=12
12/2=6
6*3=18
18/2=9
9*3=27
27/2=13.5

Like? Yes (2) | No   

B.Senthil Kumar   13 years AGO

series goes with *3, /2
4*3=12
12/2=6
6*3=18
18/2=9
9*3=27
27/2=13.5

Like? Yes (2) | No (1)  

GANESH PANDIAN.S   13 years AGO

4*3=12
12/2=6
6*3=18
18/2=9
9*3=27
27/2=13.5
ANSWER:4,12,6,18,9,27,13.5,......

Like? Yes (2) | No (1)  

jai    13 years AGO

4*3/2=6
12*3/2=18
27*3/2=9
18*3/2=27
9*3/2=13.5ANS

Like? Yes (2) | No (1)  

rko   13 years AGO

4*3/2=6
12*3/2=18
27*3/2=9
18*3/2=27
9*3/2=13.5

Like? Yes (1) | No   

Alagujeyaraj   13 years AGO

4*3/2=6
12*3/2=18
6*3/2=9
18*3/2=27
9*3/2=13.5 //ans.......

Like? Yes (1) | No   

Debashis Dey   13 years AGO

4=12/3 and 6=12/2
similarly 6=18/3 and 9=18/2
and 9=27/3 and 27/2=13.5
so answer is 13.5,option (3)

Like? Yes (1) | No   

Balakumaran N.A   13 years AGO

Multiplication of 3 and division of 2...
4*3 =12; 12/2 =6...
6*3 =18; 18/2 =9...
9*3 =27; 27/2 =13.5.

Like? Yes (2) | No (1)  

Khanna   13 years AGO

There are 2 series in

4, 12, 6, 18, 9, 27, .......

like

4,6,9
and
12,18,27
each a GP with a common ratio of 1.5.

so next number is 9*1.5 = 13.5 ...option 3

Like? Yes (3) | No (2)  

VikrantMundhekar   13 years AGO

;4*3=12
12/2=6
;6*3=18
18/2=9
;9*3=27
27/2=13.5

Like? Yes (1) | No   

K BASHA   13 years AGO

4*3=12/2=6 and 6*3=18/2=9 like as 9*3=27/2=13.5

Like? Yes (1) | No   

Ashfaque Sheikh   13 years AGO

Second number is triple of first number & third number is half of second
So next number is 27/2 which is equal to 13.5

Like? Yes (1) | No   

Manavalan K R   13 years AGO

Reason:4*3=12
12/2=6
6*3=18
18/2=9
9*3=27
27/2=13.5

Like? Yes (1) | No   

Raman   13 years AGO

4, 12, 6( 12/2), 18, 9 (18/2), 27, .......27/2 = 13.5

Like? Yes (1) | No   

Phaneendra Sandeep   13 years AGO

4*3=12; 4*3/2=6
6*3=18; 6*3/2=9
9*3=27; 9*3/2=13.5

Like? Yes (1) | No   

Prabhu m   13 years AGO

Reason-4*3=12
12/2=6
6*3=18
18/2=9
9*3=27
27/2=13.5

Like? Yes (1) | No   

Ashish Pasalkar   13 years AGO

4x12=12;
12/2=6;
6x3=18;
18/2=9;
9x3=27;
27/2=13.5

Like? Yes (1) | No   

Rakesh Sharma   13 years AGO

1st term * 3 and 2nd term *1/2

hence 27*1/2=13.5

Like? Yes (1) | No   

balamurugan   13 years AGO

reason:
4*3=12
12/2=6
6*3=18
18/2=9
9*3=27
27/2=13.5

Like? Yes (1) | No   

chanumoluprabushan   13 years AGO

2x,x,3x,3x/2......
so 27/2=13.5

Like? Yes (1) | No   

Pratik Goyal   13 years AGO

reason is 12 is 3 times of 4 and consecutively 6 is half of 12 then answer will be half of 27 that is 13.5

Like? Yes (1) | No   

alagujeyarajg   13 years AGO

4*3/2=6 like wise 9*3/2=13.5

Like? Yes (1) | No   

ranjit modi   13 years AGO

series...
4x3=12
12x(1/2)=6
6x3=18
18x(1/2)=9...and so on

Like? Yes (1) | No   

Mohammed Farook.S   13 years AGO

4/12=1/3
12/6=2
6/18=1/3
18/9=2
9/27=1/3
27/13.5=2
so the answer is option 3)13.5

Like? Yes (1) | No   

sonika thakur   13 years AGO

12-6= 6
18-9=9
27-13.5=13.5

Like? Yes (1) | No   

Abhishek Divakar   13 years AGO

a(n+2) = a(n)*(3/2)

Like? Yes (1) | No   

santhosh   13 years AGO

the series like x,x*3 , (X*3)/2 ...
if x=4
4,12,6 .. then repeat .. the same series from 6
6,6*3,(6*3)/2.
then it repeats from 9
9,9*3,(9*3)/2
4,12,6,18,9,27,13.5

Like? Yes (1) | No   

kiran   13 years AGO

*3and /2 logic so 27/2=13.5

Like? Yes (1) | No   

Naeem Ahamad   13 years AGO

4*12/8=6.
12*6/4=18.
18*6/(8+4)=9.
18*9/6=27.
so 9*27/(12+6)=13.5.ans

Like? Yes (1) | No   

Prachi Kalal   13 years AGO

4*3=12 ,12/2=6
6*3=18 ,18/2=9
9*3=27 ,27/2=13.5
so ans is 13.5

Like? Yes (1) | No   

Sadhiq.k.m   13 years AGO

I'll tel u how...4+2*4=12,
12/2=6,6+2*6=18,18/2=9,9+2*9=27,27/2=13.5

Like? Yes (1) | No   

Shantanu Singh   13 years AGO

13.5 is the correct Answer.
bcz, starting from the 3rd digit of sequence i.e 6, 6x2=12 which is the 2nd digit of sequence.. and 9x2=18.
similarly, Xx2=54
therefore X=13.5

Like? Yes (3) | No (2)  

muthu   13 years AGO

series goes with (X*3),(x*3)/2

Like? Yes (1) | No (1)