Answer:
875
Step-by-step explanation:
As given, there is a three digit number
So, let assume three digit number be `xyz`.
Now, as given tens digit is 2 greater than the unit digit.
∴ 
Next, the hundred digit one greater than the tens digit.
∴
The sum of the tens and the hundreds digits is three times the units digit.
∴
Now, substituting the value in the equation.

⇒ 
solving it to get value of y
⇒ 
⇒
∴ 
Next, finding value of z
y= 
substituting the value of y and subtracting both side by 2
∴ z= 
Last, finding the value of x

substituting the value of y
∴ x= 8
xyz= 875