What can the following function be used for?

Question $7$ options:

Checking whether a number has more than $2$ digits

Checking whether a number is even or odd

Checking whether a number is larger than $2$

Checking whether a variable is a numeric valuedef mystery $(x)$ :

if $(x\%2==0)$ :

return$("$yes$")$

else:

return$("$no$")$