What is the next number of the following sequence. 19, 342, 1368, 21888, 350208, .....

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21 Dec 2015 Sequence

What is the next number of the following sequence.
19, 342, 1368, 21888, 350208, .....

OPtion

1) 5906868
2) 5906864
3) 6408288
4) 5868388
5) 5908478
6) 5603328
7) 5869254
8) 5608282
9) 5608888
10)5468868

Solution

19
(19*2)*9 = 342 Double the number(19) and multiply with last digit (9)
(342*2)*2 = 684*2 = 1368 ( ---)
(1368*2)*8 = 2736*8 = 21888 (--)
(21888*2)*8 = 43776*8 = 350208 (--)
Similarly
(350208*2)*8 = 700416*8 = 5603328

Option 6)

Correct Option: 6 Best Solution (16)

Siva   9 years AGO

the order followed as 19,
19*(9*2) =342,
342*(2*2)= 1368,
1368*(8*2)= 21888,
21888*(8*2)= 350208,
350208*(8*2)= 5603328.

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ABHINAV PUSHPAM   9 years AGO

Only option 6 is divisible by 19
Reason- 19*1=19
19*18= 342
342*4= 1368
1368*16 =21888
21888*16= 350208
350208*16= 5603328
Option 6)

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CHANDAN KUMAR   9 years AGO

19,342,1368,21888,350208,.....
let
1st no. = 19
2nd no. = 342
3rd no. = 1368
4th no. =21888
5th no. = 350208
6th no. = ? (let x, to be calculated )

now,
?divide 2nd no. by 1st no.
342/19 =18
?divide 3rdno. by 2nd no.
1368/342 =4
?divide 4th no. by 3rd no.
21888/1368 =16
?divide 5th no. by 4th no.
350208/21888 =16

?divide 6 th no. by 5th no.
x/350208 = ?

lets solve using given options.
put x = 5603328
it will be divisible by 350208
having remainder 0.

Rest of other options are divisible but they are having some remainder.

so correct option is
6)5603328

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MRITUNJAY   9 years AGO

19 342 1368 21888 18432

18. 72. 1152. 18432

4. 16. 16

next one is 350208*16=5603328

option 6

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NIKHIL JAIN   9 years AGO

19*1=19
19*1*18=342
19*1*18*4=1368
19*1*18*4*16=21888
19*1*18*4*16*16=350208
19*1*18*4*16*16*16=5603328

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DHAYYALA SREEKANTH REDDY   9 years AGO

19^2-(19*4^0)=342|
38^2-(19*4^1)=1368
152^2-(19*4^3)=21888
608^2-(19*4^5)=350208
2432^2-(19*4^7)=5603328

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sumit kumar   9 years AGO

some of digit of no is 1,9,18,27,18 so next no will be which one has sum of digit will be 27
i.e 5603328
option 6

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Saleel Kulkarni   9 years AGO

The relation between the two nos is twice the last digit of the first no is the multiplying factor.
Therefore in 19 the last digit is 9 so 19*(2*9)=342
342*(2*2)=1368
1368*(2*8)=21888
21888*(2*8)=350208
350208*(2*8)=5603328
Option 6

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Subi Surendran   9 years AGO

19*18=342
342*4=1368
1368*16=21888
21888*16=350208
350208*16=5603328

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potani manikumar   9 years AGO

initially all numbers are multiples of 19 and next series multiples of 18 ,next series we will get qube formate from this we can find next number

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HARMEET KAUR   9 years AGO

350208
last digit is 8.
8*2=16
350208*16= 5603328

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luciya   9 years AGO

The sequence is arranged in such a form that the next number is derived by multiplying the first number with its unit place*2.
e.g.:
19, 9*2=18
18*19=342

342, 2*2=4
4*342=1368

1368, 8*2=16
16*1368=21888

21888, 8*2=16
16*21888=350208

350208, 8*2=16
16*350208=5603328

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Anurag Bawankar   9 years AGO

it is the series of alternate numbers.i.e.there are two series. 1368×256=350208
21888×256=5603328

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Jamil Ahmed   9 years AGO

19
19*18=342
19*18*(4)^1=1368
19*18*(4)^3=21888
19*18*(4)^5=350208
19*18*(4)^7=5603328

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RAHUL AGARWAL   9 years AGO

19*2*9=342
342*2*2=1368
1368*2*8=21888
21888*2*8=350208
350208*2*8=5603328
PATTERN (2*LAST DIGIT OF PREVIOUS TERM TO GET NEXT TERM)

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Mainak Bhattacharjee   9 years AGO

19*18 = 342
19*18*4^1 = 1368
19*18*4^3 = 21888
19*18*4^5 = 350208
19*18*4^7 = 5603328

Like? Yes (1) | No