The square in the middle of the square is March X.
(X-8)+X+(X+8)=24 or (X-6)+X+(X+6)=24.
X=3
3. The sum of two natural numbers is equal to 352, and the last digit of a number is 0. If this "0" is erased, it will be the same as another number. Find these two numbers.
Set another number x.
10*X+X=352
X=32
These two numbers are 32 and 320.
53X( 1/23- 1/76)-76( 1/23- 1/53)-23X( 1/53+ 1/76)
=(53-76)* 1/23+(53+23)* 1/76+(76-23)* 1/53
=- 1+ 1+ 1
= 1