# A Mean Sum of Squares

Pro Problems > Math > Statisics and Probabilities > Means## A Mean Sum of Squares

Three numbers are averaged (arithmetic mean). The result is 9. If the geometric mean is taken, the result is 6. The harmonic mean is .

3

3108

13

Calculate the sum of the squares of the three numbers.

Presentation mode

Problem by MisterMath

## Solution

In order to make it feasible for teachers to use these problems in their classwork, no solutions are publicly visible, so students cannot simply look up the answers. If you would like to view the solutions to these problems, you must have a Virtual Classroom subscription.Assign this problem

Click here to assign this problem to your students.# Featured Games on This Site

Match color, font, and letter in this strategy game

Trap all the dots in this problem-solving puzzle

# Blogs on This Site

Reviews and book lists - books we love!

The site administrator fields questions from visitors.

Like us on Facebook to get updates about new resources