







Des exercices complémentaires 
20060226 

Nathalie pose la question : Bonjour, mon fils est en 2e année dans une école de Montréal. Il éprouve des difficultés en mathématiques. Auriezvous des sites à me suggérer dans lesquels je pourrait trouver des exercices complémentaires à lui faire faire. Claude Tardif lui répond. 





Equal ordinate and abscissa 
20130815 

sonit pose la question : the slope of tangent to the curve y=(4x^2)^1/2 at the point, where the ordinate and abscissa are equal, is Penny Nom lui répond. 





Numbers or Percentage or probability or what? 
20090107 

Chew pose la question : Teacher A teaches 50 students and 45 of them obtained straight As.
Teacher B teaches 5 students and 5 of them obtained straight As.
Which teacher would you send you child to and why? Robert Dawson and Harley Weston lui répond. 





Filling a cistern with two pipes 
20080514 

ramya pose la question : two pipes P and Q would fil a cistern in 30 mins and 40 mins respectively.
both pipes being opened. find when the first pipe be turned off so that the cistern may be just filled in 20 mins.
options:
1. after 10 mins
2. after 15 mins
3. after 20 mins
4. after 25 mins Stephen La Rocque lui répond. 





1(1P)^75=0.05 
20080405 

Amy pose la question : 1(1P)^75=0.05 Stephen La Rocque and Penny Nom lui répond. 





Imprecise measurements 
20071209 

Sara pose la question : Hi!
A water tank, in the shape of a cuboid (length 1.6 m, height 1.2 m, breadth 0.8 m), is full of water.
Water is drained from the tank at a rate of 8 litres per minute. The dimensions of the tank are given to the nearest 10 cm.
The rate at which the water is drained from the tank is given to the nearest 0.5 litres per minute.
(a) Calculate the smallest possible time to drain the tank.
(b) Calculate the greatest possible time to drain the tank.
Many thanks!!! Stephen La Rocque lui répond. 





A decision based on data 
20071204 

manny pose la question : You have administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items. The higher the manual dexterity of a worker the less likelihood that worker will break significant inventory. Because of a unique contract you must hire all 10 employees from one of the two groups and none of the employees from the other.
You must decide which group to choose. Choose at least two measures of central tendency and at least one measure of dispersion for each group and use those to make your choice. Be sure to justify your choice with at least one page of discussion and analysis. Penny Nom lui répond. 





32 cis30degrees / 4 cis150degrees 
20070921 

Michael pose la question : Could you please help with this one.
32 cis30degrees / 4 cis150degrees Stephen La Rocque lui répond. 





The volume of a cistern 
20070719 

sharon pose la question : We have a cistern to hold spring water that measures 12 feet in depth by 5 feet in diameter. How much in liquid gallons will it hold? Penny Nom lui répond. 





Terminology 
20030831 

Maria pose la question : My daughter Veronica is a rising 6th grader and has to complete some Summer Math assignments and would like to ask you three questions:  ___________ are number pairs that have a product of 1.
 You can name any point on a plane with two numbers. These two numbers are called _____________.
 A _______________ is the size of a cube that is exactly 1 inch on each edge.
Thanks, Penny Nom lui répond. 





Yaxis 
19970529 

Leah pose la question : I know that the proper name for the X axis is the abscissa, but, what is the proper name for the Y axis? Chris Fisher lui répond. 

