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spare parts 13

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Spare parts has comics and random math topics for discussion. Includes questions (and answers), puzzles, and links to other sources.

7/12/13

Step Function

math comic 94 hitchcock presents 39 steps function

 

Alfred Hitchcock Presents a 39 Steps Function...

1) The domain of Hitchcock's function is (0, 39). What is the range?

2) Does [[X1]] + [[X2]] = [[X1 + X2]]?  Provide an examples and/or counter-example.

ANSWERS

 

To learn about step functions, floor and ceiling functions, and more, visit

domain range functions relations

 

 

 

7-1-15

Letters and Numbers: Consecutive Squared Integers Puzzle

 

consecutive integers squared puzzle

If A, B, C, D, and E are consecutive integers, what are they?

 

Two Answers

 Algebraic Solutions

 

 

6/27/13

Expressing 44

math webcomic 92 the enforcer harry callahan

 

Mr Callahan: "44, Magnus, is a powerful number!"

 

 

6/18/13

Trapezoid, Area, and Coordinate Geometry

 

trapezoid coordinate question

If the area of the trapezoid is 53, then what is the coordinate (a, b)?

 

ANSWER

 

 

 

6/7/13

Proportions

math comic 89 ellery cousin - lne queen and 3 portions

Fraction, Repeating Decimal, and Percentage...

 

 

 

5/17/13

"Doing Lines": Diagonals 

What is a diagonal? A line segment connecting two non-adjacent vertices in a polygon.

___________________________________________

Questions:

1) How many diagonals are in an octagon?

 

2)  How many diagonals are in a regular polygon with 20 sides?

 

3) What is a general equation for finding the number of diagonals?  (i.e. how many diagonals are in a polygon with n sides?)

 

ANSWERS

___________________________________________

 

Math Comic #86 - "Math Junkies" (5-16-13)

math comic 86 math junkies doing lines

 

 

 

 

 

5/10/13

Clock Angles

math comic 85 clock-wiseWebcomic #85 - "Clock Wise"  (click lower right corner to view)

 

Now, it's time for 3 clock angle questions!

1) What is the measure of the angle formed by the hands of a clock at 5:00?

2) What is the measure of the angle formed by the hands of a clock at 7:12?

3) Challenge:  If it is 12:02, when is the next time the minute hand will cross the hour hand?  (round your answer to the nearest second)..

(Note: the answer is not 1:05:00)

Clock sketches are at the right ----->

Answers

 

Detailed explanations of questions 1 & 2 --  plus more clock angle questions -- in geometry introduction

Detailed explanation of question 3 can be found in Random Places to Visit

 

 

 

 

 

 

 

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Follow the mathplane weekly webcomic and math questions on Facebook  

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Can you solve these 4 math problems about 44?

1) List all the factors of 44

2) Express 44 in Roman Numerals

3) Write 44 in Base 5

4) ("The Enforcer" was made in 1976) Using each number 1, 9, 7, and 6 and any math symbols and/or operations, write an equation that equals 44.

 

ANSWERS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

spare parts math comic 89 lne queen

 

 

 

 

 

 

 

 

 

 

Examples:

polygon diagonals square

Square: 4 sides; 2 diagonals

 

polygon diagonals pentagon

Pentagon: 5 sides; 5 diagonals

 

polygon diagonals hexagon

Hexagon: 6 sides; 9 diagonals

 

 

 

 

 

 

 

 

 

 

 

 

Terms in the cartoon:

Central Angle - An angle in a circle with the vertex on the circle's center.

Acute Angle - An angle with a measure less than 90 degrees.

Obtuse Angle - An angle with a measure between 90 and 180 degrees.

(Obtuse: Lacking perception or intellect; dense)

 

 

 

spare parts clock questions

 

 

 

old school math tutoring emblemtarrous chalk talk emblem for link



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