Math Central - mathcentral.uregina.ca
Quandaries & Queries
Q & Q
. .
Fresh off the press   Here are the newest items
added to Quandaries & Queries:
. .
start over

Strings of letters 2022-04-25
From Javar:
How many different combinations can I make with A 12 selection list but only using A&B



Answered by penny Nom.
The length of a line at 45 degrees 2022-04-09
From Aiden:
Let's say one line is diagonal and one line is vertical. If they eventually meet at a 45 Degree angle, How long will the diagonal line be compared to the vertical line? (For Example: If The Vertical Line is Exactly 1 Inch.
Answered by penny Nom.
sec(pi/12) 2022-03-23
From Diana:
Please help me find the exact value of the following trigonometric expression: sec(pi/12). Thanks!
Answered by Harley Weston.
A word problem 2022-01-29
From Ric:
Box of oranges weighs 9 pounds. 2/3 of oranges eaten. Box and remaining oranges weighs 4 pounds. What is weight of box when empty?
Answered by Penny Nom.
The next rational number 2022-01-14
From Sophia:
what comes after 3 1/2?
Answered by Penny Nom.
A graph with 100 vertices and one edge 2022-01-11
From Maftuna:
A graph has 100 vertices and only one edge. How many connected components does it have?
Answered by Penny Nom.
A Word Problem 2021-12-17
From Bryson:
Yolanda, Brian, and Charlie have a total of in their wallets. Brian has less than Yolanda. Charlie has times what Brian has. How much do they have in their wallets?
Answered by Penny Nom.
The height of a right triangle 2021-12-15
From Slash:
hi how can i find the height of a triangle from the hypotenuse and base. please go into some details with some steps because it is hard to understand. thanks
Answered by Penny Nom.
Simplifying a complex expression 2021-12-15
From Grace:
Write in the form. a+bi, -6-7i+8i^2+4i3-5i^4
Answered by Penny Nom.
Roll of film 2021-11-20
From Brian:
Trying to create a formula to calculate the build up on a roll of film is calculated. Except instead of of a roll, it's essentially a rectangle with two semicircles on each at the end. Example: I start with a 6" diameter core on each side, and I start winding .005" thick film on the core. The distance between the center of those cores, length of the inner rectangle is 7.125. If I continue to do this for a total length of film of 3000 feet, what will the roll length and width be. So what I need is the formula to perform this type of calculation. Can you help me? I want to be able to plug the formula in a spread sheet and to be able to input a core diameter, a film thickness and a total length and the length between the center of the two cores(which is the inner rectangle's length I'm assuming). Thanks
Answered by Harley Weston.
The sides of a 5-pointed star inscribed in a circle 2021-09-18
From Scott:
Is there a calculation for the length of each side of a five-pointed star? I am not worried about area but if I have a circle with a 7.5 foot radius and place a star inside it, how can I measure the lines creating the star?
Answered by Harley Weston.
The dimensions of a rectangle 2021-09-09
From Ash:
I need to know how to figure out the dimensions of a rectangle. I know that the area is 30ft and the perimeter is 26ft. I'm 15 and I have no idea what I'm supposed to do.
Answered by Harley Weston.
30 % off 2021-09-07
From Corrine:
When I am shopping for clothing that is for sale, the advertisement may say the item is 30% off. The original price was $70. How much would it now be? (how do I figure that out?) Thank you!
Answered by Penny Nom.
The units digit of a square 2021-09-04
From Aarzu:
Sorry this may be a dumb question but how do you find possible unit digits of a perfect square
Answered by Penny Nom.
An arithmetic and a geometric sequence 2021-08-29
From Moti:
Let {an} be an arithmetic sequence such that its 1st, 20th, and 58th terms are consecutive terms of some geometric sequence. Find the common ratio of the geometric sequence.
Answered by Harley Weston.



Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.



Home Resource Room Home Resource Room Quandaries and Queries Mathematics with a Human Face About Math Central Problem of the Month Math Beyond School Outreach Activities Teacher's Bulletin Board Canadian Mathematical Society University of Regina PIMS