Math Plane

5/20/12

Angle of Elevation: What is the height of the kite?

5/13/12

Euler's Number

Properties and definition of e



The Math Graduate: "Are you trying to deduce e?"

5/6/12

Mean, Median, & Mode: 

Question:   I have a (finite) set of integers.                    After adding another integer, the mean increased.      But, the median did not.

How did that happen?  (Explain and provide an example.)

To review these and other math definitions, try this link:



"Statisticians Road Trip"

4/22/12

"Charles JD"

Each letter represents a different number between 1 and 9. 

Find the number-letter key  (i.e. translate the letters into numbers)

4/15/12

Approximate the square root of 13 to three decimal places (without a calculator!).

Finding a number's square root by hand:

Step 1:  Choose a close perfect square. Identify its square root.

Step 2:  Divide number by the close root .

Step 3: Average the step 2 result and the close root.

Step 4: Check your answer.

If not close enough, repeat:  divide, average, check...

(See square root 13  example in the right column)



Which digit appears most often in the numbers 1-1000?

Which digit appears the least often?

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