Question

The digit in the ten’s place of a two digit number is three times that in its unit’s place. If the digits are reversed, the new number will be 36 less than the original number. Find the original number.

Answer 1

according to question let, the unit digit = x then the tens digit = 3x because according to question tens digit is 3 times of unit digit. now the number = 10(3x) + x = 31x put it eq'n 1 now , reversing the original number 10(3x) + x = 10x + 3x . 10x + 3x = 31x -36 . 36 = 31x -13x . next 36 = 18x . now x = 2 . put the value of x in eq'n 1 , 31(2)= 62 the original number obtained is 62

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Answer 2

Here is the answer , in the picture below