2. Division
Question:
Solution:
What is 250 divided by 20 (250 / 20)?
Rotate the lower left crown in either
direction to align the '25' on the
Outside Scale with '20' on the inside
scale. Read the '12.5' mark that is
aligned with the ' ' mark on the Inside
Scale. Figure the number of decimal
places. The answer is 12.5.
3. Reading Ratios
Question:
Solution:
What is 'x' in the calculation thirty
divided by 20 equals 60x
(30/20 = 60x)
Rotate the lower left crown in either
direction to align the '30' on the Outside
Scale with the '20' on the inside scale.
At this time, the asnwer of '40' can be
read from the Inside scale
corresponding to '60' on the Outside
scale. In addition, the ratio of the value
on the Outside scale to the value of the
Inside scale is '30:20' at all positions on
the scale.
4. Determining the square root of a number
Question:
Solution:
What is the square root of 225?
Rotate the lower left crown in either
direction so that the value on the Inside
scale corresponding to '22.5' on the
Outside scale is equal to the value on
the Outside scale corresponding to ' '
on the Inside scale. Read off the answer
of 15 at that location.
10
10
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