This Module contains 2 lessons and 5 quizzes, showing you how to tackle the 11 Plus test questions we call "Number Triplets". In these questions, you’ll be given 3 groups of numbers. 2 of the groups each have 3 numbers, but the 3rd group only has 2 numbers. Your task is to work out what the missing number is. As always, the best approach is to do the lessons first, before moving on to the quizzes.