What is the next number of the following sequence 1243,3465,5687,78109,.........

Vaibhav Mishra   11 years AGO

There is the addition of 2 in every sequence between each number...
1243,3465
here 1+2=3,2+2=4,4+2=6,3+2=5

Like? Yes (13) | No (2)  

MAN   11 years AGO

since it is just like as the first two digit follow the sequence but last two digit follow in reverse sequence.
1243,
3465,
5687,
78109,
9101211
11121413 and so on

Like? Yes (5) | No (3)  

nishant kumar   11 years AGO

the given sequence is
1->2->4->3
then last two no comes first
3->4->6->5
5->6->8->7
7->8->10->9
9->10->12->11
so the ans is 9101211

Like? Yes (4) | No (2)  

sainath   11 years AGO

The sequence is in the format
(2n-1)(2n)(2n+2)(2n+1)
So, the 5th term is
((2*5)-1)(2*5)((2*5)+2)((2*5)+1)=9101211

Like? Yes (2) | No (1)  

Balakrishnan M   11 years AGO

1243
next number is each digit added by 2
(1+2)(2+2)(4+2)(3+2)=3465
(3+2)(4+2)(6+2)(5+2)=5687
(5+2)(6+2)(8+2)(7+2)=78109
(7+2)(8+2)(10+2)(9+2)=9101211

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sanagavarapu mahathi   11 years AGO

last digit of previous number is taken and next 4 consecutive numbers are written reversing last two

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Vidhi Atasniya   11 years AGO

every digit of this number follows an ap series with common difference 2, 2,2,2 respectively thi=us the next no. of the series should be option 3

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Anuja Subramanian   11 years AGO

1243,3465,5687,78109,...
The last 2 numbers are written in reverse order.
So proceeding like this we will get 91012.

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komal babbar   11 years AGO

the first digit follows the pattern..1,3,5,7,9
secnd digit follows pattern...2,4,6,8,10
third digit follows 4,6,8,10,12
fourth digit follows 3,5,7,9,11...so ans will be
9101211

Like? Yes (1) | No   

malarvezhi.m   11 years AGO

In the sequence the first two number is of the order 1,2,3,4,5,6....
the next two number is reverse of the first two numbers of the following sequence..

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sonali randave   11 years AGO

startnumber is 1 2 4 3
next number is 3 4 6 5
i.e next number's starting digit is first numbers last digit, & followed by sequence.
so.
next number is 5 6 8 7
next number is 7 8 10 9
next number is 9 10 12 11

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Harsh Data   11 years AGO

1243+2222=3465
3465+2222=5687
5687+2222=78109(whose no. we get after addition we put as it is)
so 78109+2222=9101211

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patil hareesh   11 years AGO

first two digits having the sequence so that 910 and next third and fourth digits are in reverse manner then the sequence will be 1211.totally 9101211

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sivaraman   11 years AGO

1243 end with 43
so starts next 3465 so this series contionus and finally get 9101112

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Ch Kumaraswamy   11 years AGO

first two no are concecutive,next two consecutive nos are reversed..

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sayantan hazra   11 years AGO

The sequence goes as: 1 2 4 3........then 3 4 6 5 .......invert the last two, then start the sequence again from those last 2......and so on...

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ASWATHY G NAIR   11 years AGO

1st number, 2nd number,4th number,3rd snum

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ShAg   11 years AGO

1_2 3_4 = 1243
3_4 5_6 = 3465
5_6 7_8 = 5687
7_8 9_10= 78109
9_10 11_12 = 9101211
positions of the last two consecutive numbers are exchanged.

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abhishek ranjan   11 years AGO

take continuous 4 numbers starting with 1 ie. 1,2,3,4. After dat last and last second no. are interchanged ie. 1,2,4,3. Next term starts with the digit at last position ie \'\'3\'\'. And no is 3,4,6,5.
So after 7,8,10,9 next no should start wid 9 & four no are 9,10,11,12. Interchange last & last 2nd. & d result is 9,10,12,11

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Ravi Kant Sharma   11 years AGO

here there are arrangement of numbers.
in series 1243,3465,5687,78109,....
numbers are arrange in the form of first place then second place then fourth place and then third place.
when one group of numbers finish then another group of numbers start in the orders.
like 1243,3465,5687,78109,...so next will 9101211

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ch.jyothsna   11 years AGO

1 2 4 3 , 3 4 6 5 , 5 6 8 7 ....in the order last two numbers are reversed and the next number starts with ending digit of before number so the answer is 9 10 12 11

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Dipak Liladhar Patil   11 years AGO

simple

9101211

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komal   11 years AGO

first 2 digits are in series like 12,34,56,78, so it should be 910.
and for the last 2 digits its the same starting from 34 but in reverse order like 43,65,87,109,1211

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Abhishek   11 years AGO

here the first 2 digit comes in series like
12,34,56,78
so the next digit must be 9,10
again third digit in the series with 2 difference like
4,6,8,10
so the nest digit must be 12
again the last on in the series with 2 difference like
3,5,7,9,
so the last one must be 11
overall the answer of the series is
9101211 i.e ans is option no.3

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Thejashwini G   11 years AGO

In the sequence, the four numbers are continous
but last two numbers are reversed . the next term starts with the last number of the previous term

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Chithra   11 years AGO

Mind calculation

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tripti harinkhede    11 years AGO

First digit of each no.is a prime no.so next one will be 9,2nd digit of the numbers are even,likewise 3rd digit starts with 4 and a series of even no. again ,last digits r odd Nos. So ans is 9101211

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Deb Das   11 years AGO

first two are the next 2 immediate number of previous one. Next two digits are two difference with the previous ones.

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rajakumar   11 years AGO

1243,3465,5687,78109
1st digit in the series 1,3,5,7
so next digit will be 9
2nd digit in the series 2,4,6,8
next digit will be 10
3rd------------ 4,6,8,10
next digit will be 12
4th --------------------- 3,5,7,9
next digit will be 11
final answer is 9101211

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Rojarani   11 years AGO

4 consecutive numbers and last two consecutive number interchanged their position i.e 1,2,4,3
next will be 3,4,6,5

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Rashmi bharti   11 years AGO

The given sequence is 1243,3465,5687,78109,...
As we can see in 1st term of sequence is 1243 i.e, it is the combination of 4 consecutive digit starting from 1 and arranged in the manner like 12 and rest of the digit arranged in reverse order of its order i.e, 1243 and then the next term is starting from the last digit of the previous term and then follow the same order as previous one.1243,3465,5687,78109,...So the next term would start from the last digit of previous one i.e, 9 and then its consecutive digit is 10 and then next two consecutive digits in reverse manner i.e, 1211,so the term would be 9101211.

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susmit   11 years AGO

1243, 3465, 5687, 78109.
Therefore :- The first sequence is 1, 3, 5, 7.
Differences :- 2, 2, 2.
Therefore :- Next number = 9.
Second sequence is 2, 4, 6, 8.
Differences :- 2, 2, 2.
Therefore :- Next number = 10.
Third Sequence :- 4, 6, 8, 10.
Differences :- 2, 2, 2.
Therefore :- Next number = 12.
Fourth Sequence :- 3, 5, 7, 9.
Differences :- 2, 2, 2.
Therefore :- Next number = 11.
Therefore :- Next number will be = 9101211.
Hence option no.) 3.

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Alok kumar   11 years AGO

1243,3465,5687,78109,........

so,the next will be 9101211

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sanjay singh   11 years AGO

FIRST TERM=1,3,5,7,9
THE NEXT TERMS ARE 10,12,AND 11
THE CORRECT ANSWER IS 9101211

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LOGAN WOLVERINE   11 years AGO

1243 is first four numbers 3&4 are interchange.
next four from 3 is 3456 but 5&6 are inter change .
.........

so four digits from 9is 9101112.
but 11 &12 are interchange.

ans 9101211 option 3

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Gokul Krishnan   11 years AGO

1243,3465,5687,78109,
hence the nxt is 9101211

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Bingumalla Abinay   11 years AGO

1234 became 1243
3456 3465
78910 78109
9101112 9101211

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Mariappan   11 years AGO

1st num,2nd num,4th num,3rd num

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Sahil   11 years AGO

ez c h yar...hope sbko smjh aahigya hoga..!!

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FRANKLIN VIJAY   11 years AGO

1 2 4 3
3 4 6 5
5 6 8 7
7 8 10 9
9 10 12 11
1st two numbers same and other two reverse

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Niraj   11 years AGO

four consecutive digits and last two digits in reverse order.
1234 => 1243
3456 => 3465
5678 => 5687
78910 => 78109
9101112 => 9101211

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Jasmine Khan   11 years AGO

firstly wrilte down the sequence in the order,
1234,3456,5678,78910,9101112
now interchange the last two digits,
1243,3465,5687,78109,9101211

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Mayuresh Srivastava   11 years AGO

Numbers are written consecutively but last two numbers are in reverse order.
12(4)(3)
34(6)(5)
56(8)(7)
78(10)(9)
9(10)(12)(11).

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saurabh saraff   11 years AGO

first 2 digits increasing in order..
next two increasing with addition of 2.

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sanjay kumar saha   11 years AGO

1243 3465 5687 78109 9101211

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Madhu pericherla   11 years AGO

1st series
1st digit+1=2nd digit
2nd digit+1=4th digit
4th digit+1=3rd digit

2nd series
1st digit(1 st series last digit)
1st digit+1=2nd digit
2nd digit+1=4th digit
4th digit+1=3rd digit
so on....
so ans is 9101211

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ravi singh   11 years AGO

answer is 9101211

its a continue natural but the 3rd and 4th term are interchange like in 1234

1st term is 1
2nd term is 2
3rd term is 3
4th term is 4

but it should written as 1243
means
1st term
2nd term
4th term
3th term

therefore according to this answer is option 6

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vky   11 years AGO

a(a+1)(a+3)(a+2)
a=9

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praveen sb   11 years AGO

four nos are consecutive numbers .. in dat 1st two numbers are in ascendind order and next two nos are written in the descending order... so the next number will be 9 10 12 11

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Pankaj   11 years AGO

each no. in each of the terms has a differnce of 2

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Shubhankur Manuja   11 years AGO

Sequence is of Format Tx-1,(Tx-1)+1,(Tx-1)+3,(Tx-1)+2

if last no of previous term is Tx-1.

Alternate -

You can see the pattern as 1 2 4 3
3 4 6 5
5 6 8 7
7 8 10 9

--------------------

9 10 12 11

In vertical order position wise

___
at first position 1,3,5,7,|9|

____
at second position 2,4,6,8,|10|

____
at third position 4,6,8,10,|12|

____
at fourth position 3,5,7,9,|11|

So our required no is 9101211

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Chandni Maurya   11 years AGO

ans=(3)9101211
this sequence is depend upon order of natural no.. 1,2,3,4,5,6,7,8,9,10,11,12.....
1 2 4 3=> first two digit as it is..then 3rd and 4th in reverse
3 4 6 5=> same as previous,starting with the last digit of previous one
5 6 8 7
=> 7 8 10 9
=> 9 10 12 11 (i.e. opt (3))

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manasa epuru   11 years AGO

numbers follow a seq like 1 2 3 4 but the last two numbers in reverse order..
1234=1243
3456=3465
5678=5687
78910=78109
9101112=9101211

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Jacky shevkani   11 years AGO

the numbers are written in a sequence but only the last two digits are interchanged
that is instead me 1234 it is 1243 and this is continued.
so the missing number is 9101211

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lakshmi chaitanya   11 years AGO

sequence is as:abdc
hence 1243,3465,5687,78109,9101211

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ashiwani kumar singh   11 years AGO

pevious no. last digit as the first digit of the next no.
ans=9101211;

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Raju Sharma   11 years AGO

1243
3465
5687
78109
9 10 12 11

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Ankit Shukla   11 years AGO

1,3,5,7, so 9
2,4,6,8,10 so 10
4,6,8,10 so 12
3,5,7,9 so 11
thus ans is 9101211

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devendra kumar gond   11 years AGO

sequences are arranged from forward and backward

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siddanth   11 years AGO

each term in the sequence is X+1 X+2 X+4 X+3

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raju kumar sah   11 years AGO

last no of this series are 78109 then next no. is last two digit written in increasing order and after that next two digit of the increasing order will written in reverse order...ie 9101211

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Chandra sekhar reddy   11 years AGO

given sequence 1243,3465,5687,78109,

Now follow the given sequence it was found that,
first digit is like 1,3,5,7...
second is 2,4,6,8...
third is 4,6,8,10...
last one is 3,5,7,9...

The upcoming digit in above sequences are,
first:9
second:10
third:12
last:11

So, the answer is 9101211
ANSWER is choice 3........

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Shubham Kumar   11 years AGO

corresponding digits increases by 2...
..like first no. is 1243 n second no. is 3465..here first digit increases from 1 to 3 (by 2),second digit increases from 2 to 4 (by 2),third digit increases from 4 to 6 (by 2)..similarly last digit also...and so on all the numbers...

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Abhisar Garg   11 years AGO

the last two digitts from the previous number are been the first two dogits of previous numbers and next two gits are thenext two numbers of the same series in reverse order!!!.

1243->3465
3465->5687
87109->9101211

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ankit kumar verma   11 years AGO

series is 1 2 4 3
then 3 4 6 5
on observing series is a b d c,c d f e
so next term is 9 10 12 11

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vikash kumar   11 years AGO

3465-1243=2222
5687-3465=2222
78109-5687=2222
9101211-78109=2222

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neelima singh   11 years AGO

the first and second number are arranged in the sequential order and the next sequential order is interchanged eg: 1,1+1=2,2+1=3 ,3+1=4 but the numbers in ones and tenth place is being interchanged.and for next it should be start with the same number which is the unit place in the previous number the order is repated and finally we get the option 3

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FAISAL RIZWAN   11 years AGO

In the following series last two no. are reversed and next no. is started with the last reversed no

1243,3465,5687,78109,....
so the answer is option 3 i.e 9101211

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Raju Mandal   11 years AGO

1243
3465
5687
78109
9101211

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arjun   11 years AGO

consider 78109 add each number with 2
i.e 7+2=9
8+2=10
10+2=12
9+2=11
so ans is 9101211

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RAJ MISHRA   11 years AGO

becoz we can write 1243-3465
3465-5687
5686-78109
therfore we can also write
78109-9101211

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Raghuram Parvataneni   11 years AGO

difference in first digits is 2. so the last number starts with 7+2 = 9

9 10 as per the series 12 comes next and then 11

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Mahesh Malwade   11 years AGO

first 2 digits of each number are in sequence
i.e. 12.. 34.. 56.. 78.. 910..
last two digits in each number are next 2 numbers that of first 2 number but in descending order
i.e. for 1st number: 1243
3 and 4 are digits in sequence of first 2 digits..
after writing them in descending order..
that number becomes 1243.
so, the fifth no in given series starts with 910,
next two no in sequence 11 and 12,after writing them in descending order we will get ans as;
9101211

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shamily.k   11 years AGO

In the above sequence the frst two no are in ascending order of the numerics.
next 2digit no are descending order of the numerics.

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sridevi   11 years AGO

1243,3465,5687,78109,...
The last 2 numbers are written in reverse order.
So proceeding like this we will get 91012.

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seema chauhan   11 years AGO

firt no is insreament as 1 3 5 7 after then 9
second no seq is 2 4 6 8 and then 10
third no seq is 4 6 8 10 and then 12 will come
forth no seq is 3 5 7 9 and then 11 come
so ans is 9101211

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Jhansi   11 years AGO

the first two digits of the number are ascending and the last two digits are descending, the last number being the consecutive no. of 2nd digit. the next number in the sequence starts with last digit of the previous number.

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Abhishek misra   11 years AGO

starting with last digit and alternate the position of last digit with the previous

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Sendhav Pravinkumar Jesangbhai   11 years AGO

increase two decimal

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