Question

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The sum of digits of a number is 12. If both are interchanged, then the newly formed number is 36, more than the original number. What is the original number?​

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Answer 1

Please Refer the Attachment for your Answer.

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Answer 2

Answer:

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Let the unit digit=X

Tens digit=12-X

The number=10(12-X)+X

The number after reversal=10(X)+12-X

The equation:-

10(12-X)+X-36 =10X+12-X

120–10X+X-36=10X+12-X

-10X+X-10X+X=12–120–36

-18X=-144

18X=144

X=144/18

X=8x

X=unit digit=8

Tens digit=12–8=4

The number=10(4)+8=48

Reverse number=84

84 is 36 more than 48

So the desired number is 48

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