Open your favorite social media platform and note how many friends or followers you have. Specifically, note the first digit of this number. For example, if you have 400 friends, the leading digit is ...

What is a number sequence? A number sequence is a list of numbers that is linked by a rule or pattern. If you work out the rule, you can work out the next numbers or a missing number in the sequence.

A pattern or a sequence is a set of numbers that are connected in some way. All sequences have a rule. For example, sometimes the numbers might count on by 5 each time, other times they might be ...