Question

the tens digit in 2 digit no. is half the units digit. if digits are reversed , the number is increased by 36. find the number.​

Answer 1

Answer:

48

Step-by-step explanation:

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