Question

please urgent hai yaar do fast​

Answer 1

1

value of a is 1 and value of b is 3

i.e 

513315

digit sum of number is 5+1+3+3+1+5=18 

Therefore number is divisible by 3 

and Number end with 5 

Therefore it is divisible by 5 also

2

By Divisibility Conditions:

i ) A natural number is divisible by 3

if and only if sum of it's digits is

divisible by 3 .

ii ) A natural number N divisible by

5 if and only if the digit in it's unit

place is either 0 or 5 .

But according to the problem given ,

We need odd number so the unit

place digit must be 5 .

****************************************

Now ,

the required odd number

ababab must be like this ,

a = 1 to 9 , b = 5

Example :

1515151 ,

252525,

353535 ,

454545 ,

555555 ,

656565 ,

757575 ,

858585 ,

959595 ,

I hope this helps you.

: )

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