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In a two digit number, the ten’s digit is three times the units digit.

If 36 is subtracted from the number, the digits interchange their places.
Find this two digit number.


We can do this problem by algebraic method.
Let x be the unit's place digit.
Then the ten's place digit is 3x

Also, the number is

When interchanging their digits, the new number will be 10x+3x
So, when 36 is subtracted from the number,

That is units place digit is 2. So then's place digit is 3 times 2 =6

Therefore the number is 62.
Hope you understood this


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