Question

In a two digit number the unit digit X is half of the tens digit what is the number the digit comes from​

Answer 1

Step-by-step explanation:

Solution

Let unit's digit =x and ten's digit =y

∴ Number =10y+x

Reverse number =10x+y

According to the question

2y=x...(i)

10y+x+27=10x+y ...(ii)

⇒10y+2y+27=20y+y

12y−21y=−27

−9y=−27⇒y=3

x=6

∴Number=36