Question

Pls answer this question

Answer 1

Answer:

54

Step-by-step explanation:

Two digit numbers which is a multiple of 9 :

18, 27, ..., 72, 81

We know that sum of their digits are 9.

explanation : 1+8=9, 2+7=9, ..., 7+2=9, 8+1=9

Let the number $k$.

Then, $9k=486$.

∴ $k=54$

Answer 2

Answer:

Here,

Let, digit at tenth place be x and digit at ones place be y

Then,

Number formed=10x+y

Now, according to the question,

(10x+y)(x+y)=486

(10x+y)9=486 ( as sum of digits is also divisible by 9 and every multiple of 9 have sum of digits as 9)

=》10x+y=486/9=54

Therefore, required value is 54