A Maths guide to learning and practising dividing a 2-digit number by a 1-digit number using different methods (no remainder).

Work through this article to learn how to break down a calculation when dividing a 4-digit number by a 1-digit number.

How easy would it be for a thief to guess your four-digit PIN? If he were forced to guess randomly, his odds of getting the correct number would be one in 10,000—or, if he has three tries, one ...