Comments for The Math Doctors
https://www.themathdoctors.org
Continuing the Mentoring Tradition of Ask Dr. Math (tm)Thu, 23 May 2019 12:01:14 +0000
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Comment on Frequently Questioned Answers: Uncountable Infinities by More on Uncountable Irrationals – The Math Doctors
https://www.themathdoctors.org/frequently-questioned-answers-uncountable-infinities/#comment-898
Thu, 23 May 2019 12:01:14 +0000https://www.themathdoctors.org/?p=2674#comment-898[…] I was researching for the post on uncountable sets, I ran across a discussion that didn’t quite fit, but raises interesting questions about how […]
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Comment on Frequently Questioned Answers: The Other Child by More on Gender Probability: Twins – The Math Doctors
https://www.themathdoctors.org/frequently-questioned-answers-the-other-child/#comment-875
Thu, 16 May 2019 12:00:44 +0000https://www.themathdoctors.org/?p=2556#comment-875[…] Recently we looked at the question of how likely a two-child family with a boy is to have another boy (or, to the contrary, to also have a girl). Searching for those questions turned up another one of interest involving the gender of a pair of siblings: How do things change when they are twins? […]
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Comment on Percent Change: Finding and Applying It by Percent Change: Markup and Margin – The Math Doctors
https://www.themathdoctors.org/percent-change-finding-and-applying-it/#comment-855
Thu, 09 May 2019 12:00:52 +0000https://www.themathdoctors.org/?p=2699#comment-855[…] have looked at how to calculate, apply, and undo a percent increase or decrease. Here we will look at some special terms used in business […]
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Comment on Percent Change: Finding and Applying It by Percent Change: Working Backward – The Math Doctors
https://www.themathdoctors.org/percent-change-finding-and-applying-it/#comment-847
Mon, 06 May 2019 12:01:21 +0000https://www.themathdoctors.org/?p=2699#comment-847[…] Having discussed how to calculate the percent change between two numbers, and how to apply such a change to one number to get a new number, we need to look at what may be one of the most common types of questions we get: reversing a percent change (increase or decrease) to find the original value. […]
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Comment on Long Division: When Zero Gets in the Way by Dave Peterson
https://www.themathdoctors.org/long-division-when-zero-gets-in-the-way/#comment-838
Mon, 29 Apr 2019 14:13:47 +0000http://www.themathdoctors.org/?p=123#comment-838I see that 21 divided by 2 is 10.5, not 1.5; are you giving this as an example in which you have failed to insert a required zero?

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Comment on Long Division: When Zero Gets in the Way by Rakesh
https://www.themathdoctors.org/long-division-when-zero-gets-in-the-way/#comment-837
Mon, 29 Apr 2019 13:23:43 +0000http://www.themathdoctors.org/?p=123#comment-83721/2 = 1.5??
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Comment on More on Faces, Edges, and Vertices: The Euler Polyhedral Formula by Frequently Questioned Answers: Three Utilities – The Math Doctors
https://www.themathdoctors.org/more-on-faces-edges-and-vertices-the-euler-polyhedral-formula/#comment-821
Thu, 25 Apr 2019 12:00:53 +0000https://www.themathdoctors.org/?p=1757#comment-821[…] previously discussed Euler’s Formula. Commonly we use the letters v, e, and f for the number of vertices, edges, and faces […]
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Comment on Frequently Questioned Answers: 0.999… = 1 by More on 0.999… – The Math Doctors
https://www.themathdoctors.org/frequently-questioned-answers-0-999-1/#comment-739
Thu, 18 Apr 2019 12:01:09 +0000https://www.themathdoctors.org/?p=2580#comment-739[…] collecting questions and answers about 0.999… for the last post, there were two that were too long to include, but that dig more deeply into issues that some of […]
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Comment on Area of a Triangle: Heron’s Formula I by Area of a Plot of Land – The Math Doctors
https://www.themathdoctors.org/area-of-a-triangle-herons-formula-i/#comment-624
Thu, 04 Apr 2019 12:02:32 +0000https://www.themathdoctors.org/?p=2390#comment-624[…] last four posts dealt with formulas for finding areas using lengths of sides, starting with the triangle, where that is all you need, and then quadrilaterals, where something […]
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Comment on Area of a Triangle: Heron’s Formula I by Polygon Coordinates and Areas – The Math Doctors
https://www.themathdoctors.org/area-of-a-triangle-herons-formula-i/#comment-587
Mon, 01 Apr 2019 12:01:05 +0000https://www.themathdoctors.org/?p=2390#comment-587[…] for finding areas of polygons, mostly using their side lengths. We started with triangles (Heron’s formula), then quadrilaterals (Bretschneider’s formula and Brahmagupta’s formula), and the fact […]
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