1, 6, 16, 36, 76, .... Next number will be

sivakumar   14 years AGO

1+5=6; 6+10=16; 16+20=36; 36+40=76; in this series we have to add double (i.e., 80 to the previous number). So 76+80=156

Like? Yes (8) | No (2)  

Dr.Dipin Singh   14 years AGO

series after 2nd number is 2*(previous number +2).

Means nth term = 2*[(n-1)th term +2]
as in
6=(1+2)*2
(6+2)*2=16
2*(16+2)=36
2*(26+2)=76
2*(76+2) =156

Like? Yes (10) | No (5)  

KALPANA G   14 years AGO

1-6=5,
16-6=10 (i.e.5*2),
36-16=20(i.e. 10*2),
76-36=40 i.e. (20*2),
Then 156-76=80 (40*2),
Therefore next number is 156

Like? Yes (5) | No (1)  

hemanta kumar patnaik   14 years AGO

difference between numbers are 5,10,20,40 so next is 80 so add 80 to 76

Like? Yes (5) | No (1)  

susmit   14 years AGO

multiply the number by 2 and add four to get the next number

Like? Yes (2) | No   

SUDESHNA SEN   14 years AGO

1st term:1
2nd term:1+5= 6
3rd term:6+10= 16
4th term:16+20= 36
5th term:36+40= 76
6th term:76+80= 156..... Option 3)

Like? Yes (2) | No (1)  

Abhishek kumar   14 years AGO

1+5=6
6+10=16
16+20=26
26+40=76
76+80=156

Like? Yes (3) | No (2)  

mohit mishra   14 years AGO

1+5=6
6+(5*2)=16
16+(10*2)=36
36+(20*2)=76
76+(40*2)=156

Like? Yes (2) | No (1)  

pulakesh banerjee   14 years AGO

difference between 1 and 6 is 5,6 and 16 is 10 i.e.5*2=10.differences betwwn thwe nunbers are double of frevious difference.proceed this way and solve it

Like? Yes (2) | No (1)  

Manikanta   14 years AGO

6-1=5
16-6=10
36-16=20
76-36=40
156-76=80......
...........

Like? Yes (2) | No (1)  

goutam Choudhury   14 years AGO

In this series difference is just getting double.5,10,20,40,80...

Like? Yes (1) | No (1)  

suchandra raavi   14 years AGO

see the difference b/w numbers its 5,10,20,40...
So ans is clearly 156

Like? Yes (2) | No (2)  

~Sandeep~   14 years AGO

Sum of rows of Binomial transformation of a triangular matrix with 1's in the main diagonal and 4's in the subdiagonal:
1; Sum=1
5, 1; Sum=6
9, 6, 1; Sum=16
13, 15, 7, 1; Sum=36
17, 28, 22, 8, 1; Sum=76
21, 45, 50, 30, 9, 1; Sum=156

Like? Yes (2) | No (2)  

Mithila Nand Jha   14 years AGO

1st no +5 gives 2nd no
2nd no +10 gives 3rd no
3rd no +20 gives 4th no
4th no +40 gives 5th no
hence 6th no will be 5th no + 80 i.e 76+80=156

Like? Yes (1) | No (1)  

ASHOK ROY   14 years AGO

1st term:1
2nd term:1+5= 6
3rd term:6+10= 16
4th term:16+20= 36
5th term:36+40= 76
6th term:76+80= 156..... Option 3)

Like? Yes (1) | No (1)  

PADMASHREE   14 years AGO

76+80=156. option 3

Like? Yes (1) | No (1)  

Rajarshi Saha   14 years AGO

The series is:
1x2+4 = 6
6x2+4 = 16
16x2+4 = 36
...
so, 76x2+4 = 156

Like? Yes (2) | No (2)  

Prashasti Nag   14 years AGO

1x2=2
now,2+4=6
6x2=12
12+4=16
likewise..
36x2=72
72+4=76
nd finally,76x2=152
152+4=156

Like? Yes (1) | No (1)  

SUBHAJIT GUHA   14 years AGO

6-1=5
16-6=10
36-16=20
76-36=40
at each time the value doubled.
So the nxt value is
40*2+76=156

Like? Yes (1) | No (1)  

Sathish   14 years AGO

1
+ 5 = 6
+ 10 = 16
+ 20 = 36
+ 40 = 76
so, + 80 = 156

Like? Yes (1) | No (1)  

animesh paul   14 years AGO

evry number difference is doubled from the previous difference

Like? Yes (1) | No (1)  

Rajdeep Kabiraj   14 years AGO

As because there is a gap 0f every no in double of difference.i.e. 5 ,10, 20 ,40 .so the next no will be in difference of 80.so the answer is 156

Like? Yes (1) | No (1)  

Achelal Sharma   14 years AGO

1 + 5 * 2^0 = 6
6 + 5 * 2^1 = 16
16 + 5 * 2^2 = 36
36 + 5 * 2^3 = 76
76 + 5 * 2^4 = 156

Like? Yes (1) | No (1)  

pulkit keshar   14 years AGO

because it is sequence which is having a difference which is doubling itself....1+5=6, 6+10=16, 16+20=36, 36+40=76 so next will be 76+80=156.

Like? Yes (1) | No (1)  

Shreya   14 years AGO

1
1+5=6
6+10=16
16+20=36
36+40=76
76+80=156

Like? Yes (1) | No (1)  

ATUL   14 years AGO

unit place s same.
tenth place changes as 2 to d power 'n'

Like? Yes (2) | No (2)  

YadeeshKumar   14 years AGO

prev term * 2 + 4

Like? Yes (1) | No (3)