Question

write two
digit
number with sum of its
digit 9​

Answer 1

Step-by-step explanation:

There are 10 two digit numbers with sum of their digits 9:

18 , 27 , 36 , 45 , 54 , 63 , 72 , 81 , 90 , 99.

You can notice that all these are exactly divisible by 9.

Thanks

Answer 2

Answer:

Answer would be 45.

If you add 9 to it, you get 54, in which digits of 45 are reversed.

OK. Now the question is how to find it.

Let say  tn  be the first two-digit number.

Its value can be written as  10t+n , and we kno w   t+n=9  

Adding 9 to tn would make it reversed and thus its value would be  10n+t  

Now we have

Step-by-step explanation: