Question

a number has two digits . The unit digit is four times than tens digits . if the difference between the number obtained by reversing the digits and the original number is 54, find the original numberbhgffvb
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Answer 1

Answer:

4

Step-by-step explanation:

Let the original number be xy=10x+y

Digit's on 10's place=x

Digit in units place=y

Given that x=4y

reversed number yx=10y+x

yx=xy−27

10y+x=10x+y−27

9x=9y+27

x=y+3

x=4y

4y=y+3

3y=3

y=1

x=4(1)=4

∴ original number=4

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Answer 2

Answer: 4

Step-by-step explanation:

Let the original number be xy=10x+y

Digit's on 10's place=x

Digit in units place=y

Given that x=4y

reversed number yx=10y+x

yx=xy−27

10y+x=10x+y−27

9x=9y+27

x=y+3

x=4y

4y=y+3

3y=3

y=1

x=4(1)=4

∴ original number=4

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