Can you crack it and prove your mental agility ... One of the users trying to solve the brain teaser wrote, “Start with division and multiplication first: 3 ÷ 3 = 1, then 1 x 2 = 2.

When multiplying a 2-digit number by a 1-digit number you can use both mental and written methods. Let's take a look at an example of solving a multiplication problem in your head. Before you ...