Choose any 3-digit number. describe how to find the number that is 10 more

If you choose any 3-digit number and want to know that what is 10 more than that number , you can simply use place value of tens to get the answer. Just add 1 to the tens place of the 3-digit number to get the answer.

For example : To find 10 more than 959

Here 959 is a 3-digit number with tens place of 5 ,then just change 5 to 6 by adding 1 to it ,[other two digits remain same]such that

959+10=969

 = -2x^2+6x+4