Ann Theressa   11 years AGO

22
22*2 - 1 = 43
43*2 - 2 = 84
84*2 - 3 = 165
165*2 - 4 = 326
326*2 - 5 = 647
647*2 - 6 = 1288

Like? Yes (8) | No (2)  

RAKESH   11 years AGO

22, 43, 84, 165, 326, 647, ...
2 2, 4 3, 8 4, 16 5, 32 6, 64 7, 128 8

1288

Like? Yes (6) | No (1)  

Dr.Dipin Singh   11 years AGO

22*2-1=43
43*2-2=84
84*2-3= 165
165*2-4= 326
326*2-2-5= 647
647*2-6= 1288

Like? Yes (2) | No   

Mahalakshmi   11 years AGO

22+21=43
43+41=84
84+81=165
165+161=326
326+321=647
647+641=1288
so ans is 4)1288

Like? Yes (2) | No (1)  

Rajasekhar Reddy   11 years AGO

22+(22-1) = 43
43+(43-2) = 84
84+(84-3) = 165
.
.
. 647+(647-6) = 1288

Like? Yes (2) | No (1)  

upendra singh chahar   11 years AGO

add 1 in unit digit;
and double remaining digits, as
2*2 = 4; 2+1 = 3 => 43
same
(64*2) = 128; 7+1 = 8 => 1288

Like? Yes (2) | No (1)  

RAVI GUPTA   11 years AGO

22*1=22
22*2=44-1=43
43*2=86-2=84
84*2=168-3=165
165*2=330-4=326
326*2=652-5=647
647*2=1294-6=1288

Like? Yes (1) | No   

SREEVIDHYA P P   11 years AGO

First number 22
Then (2*2)(2+1)=43
(4*2)(3+1)=84.......
last (64*2)(7+1)=1288

ie.,first no.

Like? Yes (1) | No   

Vivek Tiwari   11 years AGO

the second number is two times the first number -1, the third no is two times the second no -2 and so on, hence the last number would be two times 647-6 i.e 647*2-6=1288

Like? Yes (1) | No   

chandan jha   11 years AGO

22*2=44-1=43
43*2=86-2=84
...647*2=1294-6=1288.

Like? Yes (1) | No   

garima singh   11 years AGO

the sequence has the last bit in increasing order and the starting bits are exactly double of the previous number's starting bit.

Like? Yes (1) | No   

vivek poddar   11 years AGO

multiply by 2 and minus by 6

Like? Yes (1) | No   

Rahur Kumar Sinha   11 years AGO

Each number multiplied by to and then subtracted 1,2,3,4,5,6... sequently to get the next consecutive number

Like? Yes (1) | No   

Ranjitha   11 years AGO

Add the two digits of previous number which is the first digit of next number and the second digit is obtained by incrementing second digit of previous number.

Like? Yes (1) | No   

indrajeet yadav   11 years AGO

22*2=44-1=43
43*2=86-2=84
84*2=168-3=165
165*2=330-4=326
326*2=652-5=647
647*2=1294-6=1288

Like? Yes (1) | No   

manish chauhan   11 years AGO

647*2-6=1288

Like? Yes (1) | No   

AMIT SINGH   11 years AGO

as 43=22*2-1
84=43*2-2
165=84*2-3
similarly
647*2-6=1288

Like? Yes (1) | No   

llamar   11 years AGO

22+21=43
43+41=84
84+81=165
165+161=326
326+321=647
647+641=1288

Like? Yes (1) | No   

Udhaya kumar   11 years AGO

2 4 8 16 32 64 128
2 3 4 5 6 7 8
1288........

Like? Yes (2) | No (1)  

ankita jain   11 years AGO

the firt digits are like 2, 2 square....64*2=128
next second digits are like=2,3,4,5,6,7,8
so ans-1288

Like? Yes (1) | No   

srilakshmi   11 years AGO

22 --> (2*2)(2+1) = 43
43 ---> (4*2)(3+1) = 84
84 ----> (8*2)(4+1) = 165
.
.
.
.
647 ----> (64*2)(7+1) = 1288

Like? Yes (1) | No (1)  

Devendra Marghade   11 years AGO

22*2-1= 44-1 =43
43*2-2= 86-2 =84
84*2-3=168-3 =165
165*2-4=330-4=326
326*2-5=652-5=647
647*2-6=1294-6=1288

Like? Yes (1) | No (1)  

MD SOHAIL AKHTER   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
647*2-6=1288

so the correct option is (4)

Like? Yes (1) | No (1)  

ASHISH MITTAL   11 years AGO

22+21=43
43+41=84
84+81=165
165+161=326
326+321=647
647+641=1288
so answer will be option (4)

Like? Yes (1) | No (1)  

Sagar Jinachandran   11 years AGO

43-22= 21
84-43= 41
165-84= 81
326-165= 161
647-326= 321
the next difference is 641
so next number = 647+641=1288
Option 4

Like? Yes (1) | No (1)  

ravi prakash   11 years AGO

Multiply The digit except unit digit with 2 and increment by 1 to unit place digit and write the no.
64*2=128
and
7+1=8 in unit place
1288 is the answer

Like? Yes (1) | No (1)  

susmit   11 years AGO

22*2-1=43
43*2-2=86 and so on
so
647*2=6= 1288

Like? Yes (1) | No (1)  

harshal agrawal   11 years AGO

22*2 - 1 = 43
43*2 - 2 = 84
84*2 - 3 = 165
165*2 - 4 = 326
326*2 - 5 = 647
647*2 - 6 = 1288

Like? Yes (1) | No (1)  

SIBNATH HALDER   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

pravallika pasam   11 years AGO

Double the number and reduce 1,2,3,4,5,6
22+22-1=43
43+43-2=84
.
.
.
647+647-6=1288

Like? Yes (1) | No (1)  

Leelanand Kumar Yalla   11 years AGO

647*2-6=1288;

Like? Yes (1) | No (1)  

vicky kumar   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

S Prakash   11 years AGO

Take Difference in first 2 numbers,then subtract -1 and multiply by 2 and add +1.Then add this new value and previous value.

43-22=21
(21-1)*2+1=41
43+41=84
(41-1)*2+1=81
84+81=165
(81-1)*2+1=161
165+161=326
(161-1)*2+1=321
326+321=647
(321-1)*2+1=641
647+641=1288
Answer is 1288.
Option 4.

Like? Yes (1) | No (1)  

Keshav Kishlay   11 years AGO

64*2=128
7+1=8
so, 1288

Like? Yes (1) | No (1)  

Yekollu Muneeswar   11 years AGO

ans 1288
22 * 2 = 44 -1 =43
43 * 2 = 86 -2 =84
84 * 2 = 168 -3 =165
165 * 2 = 330 -4 =326
326 * 2 = 652 -5 =647
647 * 2 = 1294 -6 =1288

Like? Yes (1) | No (1)  

gowtham   11 years AGO

IN GIVEN SERIES
first digit is power of 2^(n+1) for n=0,1,2,3...
where as second digie is order ie.,2 3 4
2=2
2^2=4
2^3=8
2^4=16
2^5=32
2^6=64
2^7=128
where as second 2,3,4,....
compare with giwen serise
22,43,84,165,326,647,is the next serise number 1288

Like? Yes (1) | No (1)  

Ramesh.V   11 years AGO

The reason for MULTIPLY TO THE FIRST DIGIT
EG:-2*2=4,4*2=8,8*2=16,16*2=32,32*2=64,(64*2=128).
so the sequence will be start for 128 next the lost digit will find out for digits 2,3,4,5,6,7,( 8 ).
THAT'S WILL BE THE ANSWER[1288].

Like? Yes (1) | No (1)  

T.Aravinth kumar   11 years AGO

647+ 641=1288

Like? Yes (1) | No (1)  

Sudipta Mukherjee   11 years AGO

647*2=1294-6=1288

Like? Yes (1) | No (1)  

ABHOY KUMAR   11 years AGO

22
43=22*2-1
84=43*2-2
165=84*2-3
326=165*2-4
647=326*2-5
NEXT=647*2-6=1288

Like? Yes (1) | No (1)  

MONIKA   11 years AGO

22
22+21=43
43+41=84
84+81=165
165+161=326
326+321=647
647+641=1288

Like? Yes (1) | No (1)  

KALIA MUDULI   11 years AGO

Given Sequence are 22, 43, 84, 165, 326, 647, .....

22*2-1 = 44-1=43
43*2-2 = 86-2= 84
84*2-3 = 168-3= 165
165*2-4 = 330-4= 326
326*2-5 = 652-5= 647
647*2-6 = 1294-6= 1288

so Ans- Op(4)

Like? Yes (1) | No (1)  

arijit roy   11 years AGO

each gap between 2 consequtve number increases like
(2 * before gap value) - 1

Like? Yes (1) | No (1)  

RAJESHKUMAR   11 years AGO

22*2-1= 43
43*2-2= 86
86*2-3= 165
165*2-4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

sruthi   11 years AGO

22,43,84,165,326,647,
here take
22 =2+2 =4 and 2+1=3 so next number 43
43=4+4=8 and 3+1=4 so next number is 84
84=8+8=16 and 4+1=5 so next number is 165
165=16+16=32 and 5+1=6 so next number is 326
326=32+32=64 and 6+1=7 so next number is 647
647=64+64=128 and 7+1=8 so next number is 1288
option 4 is answrer

Like? Yes (1) | No (1)  

SHUBHAM KUMAR   11 years AGO

647*2-6

Like? Yes (1) | No (1)  

g.soujanya   11 years AGO

22+22=44-1=43
43+43=86-2=84
84+84=168-3=165
165+165=330-4=326
326+326=652-5=647
647+647=1294-6=1288

Like? Yes (1) | No (1)  

steffy edmond   11 years AGO

Ans:Option 4) 1288
The given sequence is 22, 43, 84, 165, 326, 647, ........
The last digit in each number is in the increasing order 2,3,4,5,6,7.... so the next number will be 8.
the first digits in each number2,4,8,16,32,64etc are multiplied by 2to get the next=2,4,8,16,32,64,....so the next number is 64*2=128
so the ans is 1288

Like? Yes (1) | No (1)  

Hemalatha   11 years AGO

64*2=128 and adding 8

Like? Yes (1) | No (1)  

salma   11 years AGO

22+20+1=43
43+40+1=84
84+80+1=165
165+160+1=326
326+320+1=647
647+640+1=1288

Like? Yes (1) | No (1)  

Mukesh Nayal   11 years AGO

second number is twice plus 1 of first number

Like? Yes (1) | No (1)  

Purosotam Gupta   11 years AGO

by the question
22*2=44-1=43
43*2=86-2=84
84*2=168-3=165
.
.
.
same as
647*2=1294-6=1288

Like? Yes (1) | No (1)  

NIRUPOM GHOSH   11 years AGO

Prev no are 22,43,84,165,326.Differences of difference is increasing double.Next no. is 647+641=1288.

Like? Yes (1) | No (1)  

gaurav bhatt   11 years AGO

22= 2*2=4 and 2+1=3 so next digit = 43
same as
647= 64*2=128 and 7+1=8 so next digit= 1288
Answer: option 4

Like? Yes (1) | No (1)  

DINESH KUMAR   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

subramani   11 years AGO

22
(22*2)-1=43
(43*2)-2=84
(84*2)-3=165
(165*2)-4=326
(326*2)-5=647
(647*2)-6=1288
so ans is 1288 and option is 4

Like? Yes (1) | No (1)  

SOUVIK TALUKDAR   11 years AGO

because 647:
(64*2)(7+1)
=(128)(8)
=1288

Like? Yes (1) | No (1)  

S.SHAFI   11 years AGO

First digit in the number is double of previous number's first digit..
Second digit in the number is increased by 1 to the previous number's second digit....

Like? Yes (1) | No (1)  

Sundar Kumar   11 years AGO

22,22+21,43+41,84+81,165+161,326+321,647+641...
answer = 4) 1288

Like? Yes (1) | No (1)  

Komala.G   11 years AGO

Option (4)
22*2 = 44-1 = 43
43*2 = 86-2 = 84
84*2 = 168-3 = 165
165*2 = 330-4 = 326
326*2 = 652-5 = 647
647*2 = 1294-6 = 1288

Like? Yes (1) | No (1)  

Sriparna Boote   11 years AGO

Here 2*2=4 and 2+1=3 so 2nd no is 43
similarly, 4*2=8 and 3+1=4 3rd no is 84
in this way 64*2=128 and 7+1=8 so the no is 1288

Like? Yes (1) | No (1)  

adarsh yadav   11 years AGO

22+21=43,44+41=84,84+81=165,165+161=326,326+321=647,647+641=1288, hence the answer is 1288

Like? Yes (1) | No (1)  

Govind raj   11 years AGO

22*2=44-1=43
43*2=86-2=84
84*2=168-3=165
165*2=330-4=326
326*2=652-5=647
647*2=1294-6=1288....

Like? Yes (1) | No (1)  

vasu kumari   11 years AGO

22*2-1=43,43*2-2=84.........647*2-6=1288

Like? Yes (1) | No (1)  

SAMRIDHI   11 years AGO

IF WE Check last digit of the sequence so it is forming a series 2,3,4,5,6,7, so next answer will be the one who have 8 in its last digit then the previous digit are the double of the one before 2*2=4
4*2=8
8*2=16
16*2=32
32*2=64
64*2=128
so answer will be 1288

Like? Yes (1) | No (1)  

Parveen Soni   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

Satish Zod   11 years AGO

647 + (647 - 6) = 1288

Like? Yes (1) | No (1)  

Ankush Kumar   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

Chithra   11 years AGO

64*2=128
next last digit 8
1288

Like? Yes (1) | No (1)  

Hari Sankhar   11 years AGO

add the number with same number and subtract each by 1,2,3,4,5,6etc.,

Like? Yes (1) | No (1)  

sai keerthi mettu   11 years AGO

first digit is power of 2 followed by the next number of previous number

Like? Yes (1) | No (1)  

yellapanthula pranav   11 years AGO

22 * 2 -1 =43
43 * 2 -2 =84
84 * 2 -3 =165
165 * 2 -4 =326
326 * 2 -5 =647
647 * 2 -6 =1288

Like? Yes (1) | No (1)  

Nishdha Bhatt   11 years AGO

22* 2 = 44, 44-1=43
43* 2 = 86, 86-2=84
84* 2 = 168, 168-3=165,,,,, so,,,, going on like this we get 647*2=1294, 1294-6= 1288

Like? Yes (1) | No (1)  

Clair Christ D   11 years AGO

22,22*2-1,43*2-2,84*2-3,165*2-4,326*2-5,647*2-6

Like? Yes (1) | No (1)  

priya agarwal   11 years AGO

the difference b/w them is number divided by 10 + 1

Like? Yes (1) | No (1)  

VIVEK VICTOR   11 years AGO

1st diff : 22-1=21
2nd diff: 43-2=41
...
...
Diff after 647 = 647-6 i.e. 641
so, no. Is 1288

Like? Yes (1) | No (1)  

Sukanya   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
Similarly 647*2-6=1288

Like? Yes (1) | No (1)  

Rajesh Pattanaik   11 years AGO

(647*2)-6=1288

Like? Yes (1) | No (1)  

AMIT   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2=4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

Ajinkya Bhagat   11 years AGO

first digit is x*2 like 2*2=4 4*2=8...
second digit is like 2,3,4,5,6,7,8

Like? Yes (1) | No (1)  

Varunraj Reddy   11 years AGO

22=>2 2=>2*2 2+1=>4 3=>43
43=>4 3=>4*2 3+1=>8 4=>84
84=>8 4=>8*2 4+1=>16 5=>165
165=>16 5=>16*2 5+1=>32 6=>326
326=>32 6=>32*2 6+1=>64 7=>647
647=>64 7=>64*2 7+1=>128 8=>1288 Ans

Like? Yes (1) | No (1)  

Rahul Bhadana   11 years AGO

22
(2*2),(2+1)=43
(4*2),(3+1)=84
(8*2),(4+1)=165
(16*2),(5+1)=326
(32*2),(6+1)=647
so finally
(64*2),(7+1)=1288

Like? Yes (1) | No (1)  

DHANANJAY Kumar   11 years AGO

2 2
*2| |+1
4 3
*2| |+1
8 4
| |
16 5
| |
32 6
| |
64 7
*2| |+1
128 8 ----- ans: 1288
--------------

Like? Yes (1) | No (1)  

Thrinadhsai   11 years AGO

first do the difference between to numbers
43-22=21
84-43=41
165-84=81
here units place doesn't change but tens place changes in multiples of two
326-165=161
647-326=321
so ans is 1288
because 1288-647=641

Like? Yes (1) | No (1)  

jagruti bhagwan salvi   11 years AGO

22+22=44=44-1=43
43+43=86=86-2=84
84+84=168=168-3=165
165+165=330=330-4=326
326+326=652=652-5=647
647+647=1294=1294-6=1288

Like? Yes (1) | No (1)  

Pallab Das   11 years AGO

22*2-1=43
43*2-2=84
84*2-3=165
165*2-4=326
326*2-5=647
647*2-6=1288

Like? Yes (1) | No (1)  

amit singh   11 years AGO

647*2-6=1288

Like? Yes (1) | No (1)  

Gitanjali K   11 years AGO

22 + 22 = 44-1 = 43 is the next no.
43+43 = 86-2 = 84
84+84 = 168-3 = 165
165+165 = 330-4 = 326
326+326 = 652-5 = 647
647+647 = 1294-6 = 1288 is the answer

Like? Yes (1) | No (2)  

SAMPATH KUMAR   11 years AGO

22,43,84,165,326,,647
(twice of the number)(sequence number)
(2)(2)
(4)(3)
(8)(4)
(16)(5)
(32)(6)
(64)(7)
so most probably the next number is
(128)(8)
and the answer is 1288

Like? Yes (1) | No (2)