Question

police is trying to find out 3-digits of a number 98100AB00C.Also,B is twice that if C.if 2-digit number is formed using A as tens digit ,C as unit digit and if subtract the number formed by reversing the digit then we get 18 as the result..

find the value of B
..

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Answer 1

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Let the tens digit be x.  

Hence, the units digit will be 2x

Number =10×(x)+(2x)=12x

When 36 is added to the number, the new number formed =12x+36

As the digits are reversed, we can also write the new number as 10×(2x)+x=21x

Hence,  

12x+36=10×(2x)+x

⇒12x+36=21x

⇒21x−12x=36

⇒9x=36

⇒x=4

Hence, the original number =12x=12×4=48