I made two columns: “must” and
“may.”
Under the “must” column there was the following: ,
√, 1, and 9.
Under the “may” column I placed: /, x, +, =, =, 2, 2,
and 3.
These are the equations that satisfy the conditions:
√9 / 1  2 x 3 + 2 = 5
√9 + 3 – 1 = 5
√9 x 2 – 1 = 5
√9 – 1 + 3 = 5
√1 x 9  3 / 2 + 2 = 5
9 / 1 x 3 – 2 = √25= 5 (In this case, it is 272=25,
then press the square root sign to get 5)
*note: It may appear that the order of operations was not followed.
However, the equations are written as they are inputted into a calculator,
thus not needing to follow the order of operations.

eeps comments:
W00t! Another new problem solved! Notice
how the solver has sent in more than one solution. Are there others?
Also, does his sequence of keystrokes work on YOUR calculator? That
is, do all calculators work the same way? I'm particularly curious
about the square root key.
