This Math quiz is called 'Verbal Reasoning - Complete the Sum 4' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.
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What you are doing in this series of quizzes is basic algebra, where a symbol stands in for a number. We hope that when you begin algebra later on in school you will be ahead of the game.
If you haven't already played our first three quizzes in this series, please do go back and play them first. Only when you have got 40 out of 40 will you be a whizz at math!