The unknown variable (often the letter \(x\)) can take any value, including decimal and negative values. To solve an equation, the value of the unknown variable needs to be found. It can be found ...

We can guarantee that x is between 1 and 9 by saying that ... many others can be used—in some cases combined—to solve the ...

If a middle-school student cannot quickly recall basic facts like 2 + 3 = 5 or 6 x 3 = 18, this will likely slow him down when working on a more complex problem. For many people, math facts come ...

Congratulations to those highly intelligent readers who were able to solve the brain teaser math puzzle within 7 seconds. Others who couldn’t find the missing value can check out the solution ...