6, 3, 9, 4.5, 13.5, ......... next number of the sequence will be

M4maths Previous Puzzles

27 Feb 2012 sequence

6, 3, 9, 4.5, 13.5, .........
next number of the sequence will be

OPtion

1) 5
2) 6
3) 7
4) 8
5) 9
6) 10
7) 4.75
8) 5.5
9) 12.5
10) none of these

Solution

the sequence follows /2, *3 rule
so next number will be 6.75

Correct Option: 10 Best Solution (11)

Dr.Dipin Singh   12 years AGO

6, 3, 9, 4.5, 13.5, .........

there are two GP series

6, 9, 13.5, .........
and
3,4.5

with common ratio of 1.5
so next number will be 4.5*1.5 = 6.75

so none of these... option 10.

Like? Yes (7) | No (1)  

Gunaseelan   12 years AGO

The Given series is divided by 2 and multiply by 3.
By doing that the answer should be 6.75

Like? Yes (6) | No (1)  

pathan   12 years AGO

The series is:
6,3,9,4.5,13.5,6.75,20.25.......
Reason:
6---------------->6
6/2=3------------>6,3
6+3=9------------>6,3,9
9/2=4.5---------->6,3,9,4.5
9+4.5=13.5 ------>6,3,9,4.5,13.5
13.5/2=6.75------>6,3,9,4.5,13.5,6.75
13.5+6.75=20.25--->6,3,9,4.5,13.5,6.75,20.25....
The Answer is first half part of number is next number and then addition of revious two numbers is next number....

Like? Yes (5) | No (2)  

Atul   12 years AGO

next number will be 13.5 / 2 = 6.75

Like? Yes (4) | No (1)  

arunraj   12 years AGO

6 / 2 =3
3 * 3 =9
9 / 2 =4.5
4.5 * 3 =13.5
13.5 / 2 =6.75

Like? Yes (4) | No (1)  

Akshay Arora   12 years AGO

6/2=3
2*3=9
9/2=4.5
4.5*3=13.5
So, the answer: 13.5/2=6.75

Like? Yes (2) | No   

susmit   12 years AGO

fifth term = 1.5(third term) = 1.5 (first term)
sixth term = 1.5(fourth term)= 1.5 (second term)
so answer is 1.5(4.5)= 6.75
option no. 10 is the answer

Like? Yes (3) | No (2)  

Shiv Kumar   12 years AGO

Series is 1) 6
2) 6/2 = 3
3) 3*3 = 9
4) 9/2 = 4.5
5) 4.5*3 = 13.5
6) 13.5/2 = 6.75

Like? Yes (2) | No (1)  

Balakumaran N.A   12 years AGO

dividing the sequence /2 , will get next no. ...
13.5/2 = 6.75 opt 10.

Like? Yes (2) | No (1)  

leejia james   12 years AGO

6.75 is the answer
6/2=3=9/3
9/2=4.5=13.5/3
like that
13.5/2=6.75

Like? Yes (2) | No (1)  

neena   12 years AGO

right answer is 6.75
6/2 =3
6+3=9
9/2=4.5
4.5+9 =13.5
13.5/2 = 6.75

Like? Yes (2) | No (1)