Question

Form a two digit number with x and y

Answer 1

1. Sum of the digits is a multiple of 18

Sum of the digits has to be 18 / 36 / 54 etc...

The smallest # whose sum of digits is 18 is 99. Hence # > 50. Sufficient.

2. Product of the digits is a multiple of 9

Prod of digits can be 9, 18, 27, 36.....

9 - 19 or 91

18 - 36 or 63 or 29 or 92

27 - 39 or 93

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Answer 2

Let us assume x as the digit at one's place and y as the digit at tens place,

Then the number will be ,
10y+x
How we get this value?

Take for example any two digit number, say, 34

34 can be written as 30+4
Which is equal to 3*10+4....
Here 3 is the number at tens place and 4 is at the ones place...

Hope this helps... Plz mark as brainliest...