. centre de ressources dilemmes et doutes le visage humain de mathématiques Qui sommes-nous Problème de mois activités de promotion babillard
Centrale des maths - centraledesmaths.uregina.ca
Dilemmes & doutes
« D & D »
. .
Fresh off the press   Voici les articles les plus récents
de notre base de données:
. .
nouvelle recherche

The height of a cone 2021-05-13
Carmen pose la question :
If a cone has a slant height of 25 inches and a radius of 7 inches what is the height in inches of the cone?
Harley Weston lui répond.
2.5 percent of 1.5 billion 2021-05-13
Anish pose la question :
What is the 2.5 percent of 1.5 billion?
please state if there are any general formulae of this calculation.

Thank you

Penny Nom lui répond.
An octagonal drum 2021-05-11
Louie pose la question :
I teach carpentry on an Indian reservation.
My students want to make an 18 inch drum frame.
They want to have 8 sides or an octagon shape to the drum frame.
What angle I have to set my miter saw to cut the angles to fit the octagon together.
I want to use this formula by changing the diameter of the frame.

Harley Weston lui répond.
More on a roll of paper 2021-05-07
Stephen pose la question :
Can you help with the equations to calculate the length of paper required to achieve a target outside diameter when wrapped around a core please?

The inside diameter of the cardboard core is 76mm
The thickness of the wall of the cardboard core is 5mm
The thickness of the paper is 138microns
The desired outside diameter of the finished roll is 320mm

I hope you can help me with a solution, Thank you

Harley Weston lui répond.
Word problem 2021-05-07
Donelle pose la question :
Freddy is three times as old as Mary. Mary is twice as old as Jack. Jack is 11 years old. How old is Freddy?
Penny Nom lui répond.
The maximum area of a garden 2021-04-28
Lexie pose la question :
suppose you want to make a rectangular garden with the perimeter of 24 meters. What's the greatest the area could be and what are the dimensions?
Penny Nom lui répond.
The volume of a spherical bowl 2021-04-23
Danny pose la question :
How many gallons of water in a glass bowl with the dimensions of 10 inches high and 13.5 inches wide?
Penny Nom lui répond.
Rates & Ratios 2021-04-11
Kenneth pose la question :
Is it correct to think that a rate can have units that are the same? Usually rates have units that are different to each other.
Penny Nom lui répond.
Four friends in a race 2021-04-06
Angel pose la question :
Four friends ran a race:
Ben finished seven seconds ahead of Mike.
Noel finished three seconds behind Sam.
Mike finished five seconds behind Noel.
What will be the formula to support their place?

Penny Nom lui répond.
Time, distance and rate 2021-03-10
Zander pose la question :
A lady drives 180km from her wine farm to Ceres. On her return (at night) she drove 30km/h slower. Her return takes one hour longer. At what speed did she drive home?
Penny Nom lui répond.
Bearing and distance 2021-02-22
bahlqees pose la question :
A girl starts from a point X and walks 220m on a bearing 063°.she then walks to a point Y on a bearing 156°.if Y is due east of X,calculate|XY| solve and draw the diagram please
Harley Weston lui répond.
Scale drawing 2021-02-10
Elias pose la question :
a football field is 160m long and 120m wide . Find the distance between its opposite corner flag posts . use the scale of 1cm:20m
Penny Nom lui répond.
Division in different bases 2021-02-06
Promise pose la question :
Simplify the following 302 in base6 divided by 5 in base6
Penny Nom lui répond.
Multiplying and adding two numbers 2021-02-06
Yvonne pose la question :
Two numbers multiplied to get -13 and added to get -12
Harley Weston lui répond.
Simplify 2021-02-05
Leslie pose la question :
To simplify improper fractions, do you convert it to a mixed number or leave as an improper fraction?

My daughter had a quiz in which she was supposed to simplify her answers. So, for example, on one question the answer she got was 11/10 and on another question she came up with 17/12. The teacher marked these as incorrect because they were mixed numbers. Her teacher wrote on her paper, "**name**, I even gave this back to you and told you to go through and simplify your answers!" We (her father and I) feel that the teacher wanted her to convert her answers, not simplify them but I haven't been able to find a definitive answer online. So, does simplifying improper fractions mean converting them to mixed numbers? Thank you for your help!

Penny Nom lui répond.



Centrale des maths reçoit une aide financière de l’Université de Regina et de The Pacific Institute for the Mathematical Sciences.



accueil centre de ressources accueil Société mathématique du Canada l'Université de Regina PIMS