Can we place a single digit in each , such that the following equation is true:
What (possibly different) single digit should we place in and to make the following equation true:
Give your answer as .
This is an arithmetic puzzle, where would represent the 2-digit number 89 if . It does not represent the algebraic expression . The same logic applies for the 2-digit integer .
Does there exist (possibly different) digits which we can replace the to make the following expression true:
If in each of the squares, we must fill in a distinct digit, what is the minimum possible positive value of the difference?
What identical digit can we place in , to make the following statement true: