What is the next number of the following sequence 69, 915, 515, 511, 17, .......

RAKESH   8 years AGO

69 ------ 9 (6+9) = 915


17 ------- 7 (1+7) = 78

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Aakash Beniwal   8 years AGO

last digit, and sum (6 + 9)= 9 15
similarly 5 , (9 + 1 + 5) = 515
similarly ans is
7, (7+1)
78

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ANUJ KUMAR   8 years AGO

The first digit in the sequence, is the last digit of previous number, and rest comes from the sum of all digits of previous number
Ex. second number is 915: '9' comes from 2nd digit of 69 and '15' comes from sum of 9+1+5

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viswambher   8 years AGO

In the series, the last digit of the first number is carried to be the first digit of next number and the following digits is the sum of all the digits of the preceding number.

69 : 9(6+9)= 915
915 : 5(9+1+5)= 515
515 : 5(5+1+5)= 511
511 : 1(5+1+1)= 17
17 : 7(7+1) = 78

therefore answer is 78

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MRITUNJAY   8 years AGO

69
9 (6+9)=915
5 (9+1+5)=5 15, 515
5 (5+1+5) = 511
Similarly
17
7 (1+7)= 78
Option 7

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Mukund Manohar   8 years AGO

Last digit of previous number becomes first digit of next number and the sum of digits of previous number comes after the first digit of next number.
69 = 9(6+9) = 915
915 = 5(9+1+5) = 515
515 = 5(5+1+5) = 511
511 = 1(5+1+1) = 17
17 = 7(1+7) = 78

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ABHINAV PUSHPAM   8 years AGO

69
9 (6+9)=915
5 (9+1+5)=5 15, 515
5 (5+1+5) = 511
Similarly
17
7 (1+7)= 78
Option 7)

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RAHUL KUMAR   8 years AGO

69
9 (6+9)=915
5 (9+1+5)=5 15, 515
5 (5+1+5) = 511
Similarly
17
7 (1+7)= 78
Option 7

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Bibhuti Panda   8 years AGO

Every next term is following this law:

(last digit of previous number)(Sum of digits of previous number)


So ans is (7)(1+7) = 78

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Mridula Shaw   8 years AGO

69
9 (6+9)=915
5 (9+1+5)=515
5 (5+1+5)=511
1 (5+1+1)=17
7 (1+7)=78

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Kunal nemu   8 years AGO

given 69,915,515,511,17
now 1st number 69
next number = last digit of previous number then added value of the number..
.so 2nd number = 9(6+9) = 915
3rd is 5(9+1+5)=515
4th is 5(5+1+5)=511
5th 1(1+1+5)=17
next is 7(1+7)=78

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sindhura   8 years AGO

69-->9,(6+9)=915
915-->5,(9+1+5)=515
515-->5,(5+1+5)=511
511-->1,(5+1+1)=17
17-->7,(1+7)=78

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iswarya   8 years AGO

6+9=15,nextno will be the last digit of previous number and sum of the previous digit so the next nimber be 915

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shivani   8 years AGO

915=unit place digit of 69 i.e. 9 and 6+9 i.e. 15
515=unit place digit of 915i.e. 5 and 9+1+5 i.e. 15
511= unit place digit of 515 i.e 5 and 5+1+5 i.e. 11
17= unit place digit of 511 i.e. 1 and 5+1+1 i.e. 7
unit place digit of 17 i.e. 7 and 1+7 i.e. 8 so next no. of the sequence is 78

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Jaikumar Bhatia   8 years AGO

Last digit+addition of all digits
69=>9(6+9)=915
915=>5(9+1+5)=515
515=>5(5+1+5)=511
511=>1(5+1+1)=17
17=>7(1+7)=78
Ans is 78
option is (7)

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Priya dharshini   8 years AGO

6+9=15
next number is last number of the previous one concatenated with the added answer
so next number is 515
5+1+5=11
next number is 511
5+1+1=7
next number is 17
1+7=8
next number will be 78

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Sivasis dash   8 years AGO

The sequence is last digit of previous number then sum of the digits of the previous number.
1st number is 69 next number should be 9(6+9)=915
which is the second number then 3rd number should be
5(9+1+5)=515
similarly after 17 the number should be 7(1+7)=78

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Divesh Singla   8 years AGO

69=9(6+9)=915
915=5(9+1+5)=515
515=5(5+1+5)=511
511=1(5+1+1)=17
17=7(1+7)=78

last number at first place and the sum of all the numbers so the number is formed

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Meenakshi   8 years AGO

Every next number=last digit of the number + (sum of the digits)
69=9+(6+9)=915
915=5+(9+1+5)=515
515=5+(5+1+5)=511
511=1+(5+1+1)=17
Similarly
17=7+(1+7)=78
option 7)

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Priyanka Priya   8 years AGO

last digit of the first number is the first digit of next number in the sequence followed by the sum of all digits of the first number.
69, take 9 as first digit of next number. now 6+9=15, therefore next number 915
similarly, 915, take 5 as the first digit of next number , then 9+1+5=15, therefor next number is 515
so, last is 17, then the first digit of next number will be 7 followed by(1+7=8). therefore next number is 78

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Abdul rahiman c m k   8 years AGO

First number 69
9(6+9) = 915
5(9+1+5)=515
5(5+1+5)=511
1(5+1+1) =17
7(1+7)= 78

Option 7

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Hari Sankhar   8 years AGO

odd series first num + last num and putting last number as starting number
, first +last+1 putting last number as starting number

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madanpal vishwakarma    8 years AGO

the pattern is last digit (sum of all digit )

69 ,9(6+9)=915,5(9+1+5)=515,5(5+1+5)=511,1(5+1+1)=17,7(1+7)=78


so option 7 , value 78 is correct .

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sugayathri   8 years AGO

last letter is first letter and all gives us correct answer 71 =1(1+7)=18

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Satish   8 years AGO

Last digit is first digit of nxt number and sum of num is second digit

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shakti shekhawat   8 years AGO

use last digit and sum of all numbers

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Jebas Gnana Prakash E   8 years AGO

First Digit = Last Digit of the previous no
Last Digit = Add all the digit of the previous no

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Gunakar maddi   8 years AGO

next number first digit is previous number last digit followed by previous number sum of all digits.
17->78(1+7)

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Kavitha   8 years AGO

69, 915, 515, 511, 17, ....
9(6+9), 5(9+5+1), 5(5+1+5), 1(5+1+1)

Next number would be 7(1+7) = 78

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suman    8 years AGO

915=last digit of 69 ,after then put sum(9+6)=15 then we will get ;
515= first digt is ,last digit of 915,after than put sumof digits (9+1+5)=15;
continue this process;
we get next term will be 78.

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Pratyush Maity   8 years AGO

69,
Next is last digit of the number and total of the digits
means--
9 and 6+9=15
so, next is 915
and then--
5 and 9+1+5=15 that is 515
5 and 5+1+5=11 that is 511
1 and 5+1+1=7 that is 17
so the next is---
7 and 7+1=8 that is 78
So, the answer is ---
option 7) 78

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Anish Russel   8 years AGO

It is apparent that the any numbers first digit is the last digit of the number precedes to it. The first 2 digit number 69 is followed by 915. Here first digit 9 is the last digit of 69 and the 2nd and 3rd digit 15 is obtained by adding 6 and 9. Likewise the next number of 17 is 78.

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Akshat Sood   8 years AGO

Series is like this.....

6+9=15
Placing tens digit (9) in 15=915

9+1+5=15
placing tens digit(5)=515

5+1+5=11
placing tens digit(5)=511

5+1+1=7
placing tens digit(1)=17

1+7=8
placing tens digit(7)=78

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chelmeta   8 years AGO

for 915:
9 = units digit of 69
15 = 6+9
for 515:
5 = units digit of 915
15 = 9+1+5
similarly 78 from 17
7=units digit of 78
8=1+7

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Dinesh   8 years AGO

consider 69 the first digit is the ( last number of the number) 9 and second digit is the ( sum of the digits) 15 therefore 915..so after 17 will be 78

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