Question

Sum of a number of two digits and the
number obtained by reversing the digits of
the first number is 110. If the difference of
the digits is 4, then the number is

(1) 62
(2) 73
(3) 84
(4) 51

the solution below
#But my dought is why not take 20x+y,20y+x...or similar why using only 10x+y,10y+x experts please clear my problem​

Answer 1

Answer:

Because we can write a ten digit no. in the form of 10x+y.

ex:- 54=10×5+4

so, if we want to find any two digit number we will use this.

similarly, three digits number 100x+y.