Calculating Means (Year 8 Maths)

The following test is covering 'Calculating Means' for Year 8 Maths.

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Question 1

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The mean of eight numbers is 13. What is their total?

The mean of seven numbers is 10. What is their total?

If the mean of four numbers is 5, what is their total?

If the mean of four numbers is 6, what is their total?

If the mean of 3, 6, and 9 is x, what is the value of x?

What is the mean (average) of the series 10, 20, 30, 40, 50?

What is the mean of the series 1, 2, 3, 4, 5?