M4maths Previous Puzzles

30 Dec 2011 sequence

next number of the sequence
16, 1256, 123656, 12349656, ....... will be

OPtion

1) 1234549656
2) 1235449556
3) 1234495656
4) 1234657556
5) 1234649656
6) 1233459676
7) 1234556856
8) 1234556686
9) 1224569566
10) none of these

Solution

This sequence is
16
1-25-6
1-2-36-5-6
1-2-3-49-6-5-6
1-2-3-4-64-9-6-5-6

Correct Option: 5 Best Solution (15)

Dr.Dipin Singh   13 years AGO

next number of the sequence
16, 1256, 123656, 12349656, ....... will be

5) 1234649656

Because
first number is 16 ..4^2
Next number is 1256 where 5^2=25 is written in between two digits of 16.
Next number is 123656 where 6^2=36 is written in middle of digits of 1256.

similarly next number ..
..
1234649656

Like? Yes (9) | No (2)  

DIVYA   13 years AGO

16
1256=1,5^2,6
123656=1,2,6^2,5,6
12349656=1,2,3,7^2,6,5,6
1234649656=1,2,3,4,8^2,9,6,5,6

Like? Yes (6) | No   

Rajeev Kumar   13 years AGO

4^2=16
5^2=25 in the middle i.e 1256 Acc. 2 the ques.
6^2=36 in the middle i.e 123656
7^2=49 in the middle i.e 12349656
8^2=64 in the middle i.e 1234649656
so option is 5.

Like? Yes (8) | No (6)  

sujitkumar jagtap   13 years AGO

first no. in the sequence is 16.........(4^2)
now for second no. take next square......(5^2)
i.e. 25 now insert 25 between 1 and 6 i.e.of previous no. so next no. will be
12 36 56 i.e.insert 36 between the recent square digits i.e. 2 and 5.now insert 49 between 3 and 6.so,123 49 656.. now finally insert 64 between 4 and 9..i.e.1234 64 9656......so option 5 is the correct answer.

Like? Yes (3) | No (3)  

Ganesan B   13 years AGO

16+9=25,so 1256,25+11=36,so it becomes as 123656...likewise,49+15=64,so it becomes as 1234649656..this is answer........

Like? Yes (2) | No (2)  

Anish Philip   13 years AGO

1234649656
25,36,49,64 comes at the core of every prev number

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Shiv Kumar   13 years AGO

series is consisting of squares. Starting from 4.

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Subhankar Mondal   13 years AGO

16,1(5^2)6=1256,12(6^2)56=123656,123(7^2)656=12349656,1234(8^2)9656=1234649656
so,ans=1234649656

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sabarish   13 years AGO

first number = 16
second number is = 1(6-1)(6-1)6 = 1(5*5)6=1256
Third number is = 12(6*6)56 = 12(36)56 = 123656
Fourth number is = 123(7*7)656
= 123(49)656 = 12349656
next number is = 1234(8*8)9656 = 1234649656

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Selva Narayanan A J   13 years AGO

16 = 4^2
1 5^2 6 = 1256
12 6^2 56 = 123656
123 7^2 656 = 12349656
So next number,
1234 8^2 9656 = 1234649656

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sridhar reddy   13 years AGO

the square of a consecutive number is in the middle of the digits preceding the number
1(5^2)6=1256
12(6^2)56=123656
123(7^2)656=12349656
1234(8^2)9656=1234649656

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Shubham   13 years AGO

inserting square of consecutive no.s in between.
like inserting 5^2 in 2nd term, 6^2 in 3rd and so on.
so we'll insert 8^2 in between the no to get next in that series

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Bhimu withLove   13 years AGO

16 is 4*4 kept in middle so 0 - 14
25 is 5*5 kept in middle so 1 25 6 - 1256
36 is 6*6 kept in middle so 12 36 56 - 123656
49 is 7*7 kept in middle so 123 49 656 - 12349656
So Next sequence will be,
8*8 = 64 kept in middle so 1234 64 9656 - 1234649656

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Hithesh Mohan I M   13 years AGO

each time, the square of the next number gets added in the middle.
here, first number is 16=4^2.
next number is 1(5^2)6=1256
next number is 12(6^2)56=123656
and so on....

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ANJALI TANEJA   13 years AGO

The reason is that square of a number is added in between the digits.starting from 4 ^2, 5^2,..upto 8^2 in btw d digits.

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