







An impossible problem 
20170915 

Fay pose la question : Given math homework problem of: Gary and Larry given 2 numbers and told to add together. Gary subtracted and got 14. Larry multiplied and got 799. I tried substitution:
XY=14 and X x Y=799
X= Y+14
(Y+14) Y=799 and here I'm stuck at Y squared+14 Y= 799
using substitution I got 47x17=799 but not 14b when subtracted. HELP????? Penny Nom lui répond. 





The sum of three integers is 30 
20161206 

Vaishnavi pose la question : _+_+_:30. Blanks are to be filled by(1,3,5,7,9,11,13,15) and numbers can be repeated. Penny Nom lui répond. 





Three friends bought 13 books 
20161206 

alexis pose la question : Marina bought 4 books José bought as many books as Ben bought together the 3 friends bought 13 books how many books did Ben buy Penny Nom lui répond. 





A word problem at the fair 
20161025 

Rick pose la question : Have 48 tickets to spend, have to spend them all in exactly 10 events.
Rides cost 6 tickets games cost 4 tickets & treats cost 3 tickets Penny Nom lui répond. 





External and interior angles of a regular polygon 
20160419 

pearl pose la question : a polygon has n sides.The exterior angle is 8 times the interior angle
find the value of the interior angle
find the value of n Penny Nom lui répond. 





A rotating schedule for a softball team 
20160325 

Caroline pose la question : I couldn't find a similar question, hopefully there isn't one!
I have a softball team of 18 people (7 girls and 11 boys), but am limiting each game to 13 players (6 girls and 7 boys). The season is 10 games long. How do I create a rotating schedule which allows members to play evenly? I tried separating the boys and girls to create rotation for each but I got confused. Some are unable to attend all games but for the simplicity of a rotation schedule can you please help? Robert Dawson and Victoria West lui répond. 





The sides of a triangle 
20160315 

Hitarth pose la question : Why we cannot construct a triangle ofngiven sides 5cm,5cm and 10cm? Penny Nom lui répond. 





Can you construct a regular 21gon? 
20160308 

Peter pose la question : hi, i know that if i use a compass to draw a circle, i can use the same setting to mark 6 intervals along the circle circumference, how would i go about marking out 21 equally spaced points around the circumference?
if there an online calculator i can us, or some other interesting trick?
tia
peter Robert Dawson lui répond. 





The height of a triangle 
20160203 

Brooklyn pose la question : How do I figure out the height of a triangle when it only tells me the base of he triangle? And vice versa. Penny Nom lui répond. 





Factor x^2 + y^2 
20150826 

Jerome pose la question : Factor: x^2+y^2 Penny Nom lui répond. 





Four equations in 3 unknowns 
20150823 

damien pose la question : solve:
S x U  T = 44
T  U x S = 36
U + T  S = 7
U x U / S = 4 Penny Nom lui répond. 





A rectangle and a triangle 
20140927 

rajesh pose la question : The perimeter of a rectangle is equal to the perimeter of a rightangled triangle of height 12 cm if the base of the triangle is equal to the breadth of the rectangle, what is the length of the rectangle? Penny Nom lui répond. 





A six team track schedule 
20140915 

Paul pose la question : I need to make a six (6) team track schedule. It needs to be five (5) triangular (3 team) meets with each team playing each team twice Victoria West lui répond. 





Cutting a round cake so that it doesn't dry out 
20140826 

James pose la question : I'm wondering if there's a simple way to calculate the area between two parallel chords of a circle equidistant from its diameter, or if I have the area, to find the distance between the two chords.
Here's my "problem". You may have heard of the way of cutting a round cake so that it doesn't dry out  make two parallel cuts (chords) the length of the cake, take the middle piece, then push the two pieces together.
So I know the area of a 12" cake, and I want say, exactly an eighth of the cake. How wide do I cut the centre piece?
Now to get even more difficult, the next day I want another eighth from the centre. How wide do I cut the next pieces, and so on...?
Thanks,
James Harley Weston lui répond. 





An isosceles tiangle 
20130616 

Izzy pose la question : what's the height of an isosceles triangle which has a base of 50 m, and both of the other sides are 25 m? Penny Nom lui répond. 





How to find the base length of a isosceles triangle if only the sides are given? 
20120425 

aqilah pose la question : how to find the base length of a isosceles triangle if only the sides are given? Chris Fisher lui répond. 





A mythical soccer ball 
20111027 

Joel pose la question : We've been working on this problem diligently and can't seem to come up with the answer book's answer. We think it may be wrong, yet want to check it with an expert. Here goes.
The school's new soccer balls are covered with 64 regular hexagonal panels. Each hexagon measures 2 inches between opposite corners and 1.5 inches between opposite sides. What is the total surface area of the soccer ball? Robert Dawson and Lorraine Dame lui répond. 





A four digit number 
20110916 

gina pose la question : i am having a hard time figuring this out.. i believe the answer is 3105 but the 0 is throwing me off... i am a 4 digit number between 3100 and 3200, none of my digits are even, the sum of my digits is 9, the largest digit is in the ones place, what number am i ?? Penny Nom lui répond. 





2x = 2+2x 
20110115 

james pose la question : 2x=2+2x can you help me find what x epauls? Penny Nom lui répond. 





A cube with twice the volume 
20100411 

Woojin pose la question : From a given cube create another cube with twice the volume.
the cube: 5cm each. Tyler Wood lui répond. 





An impossible isosceles triangle 
20100131 

Hailey pose la question : An isosceles triangle has one angle that measures 50 degrees and another that measures 70 degrees. Why can't this triangle be drawn? Penny Nom lui répond. 





Triangles on a base of 2.4 meters 
20091226 

Allan pose la question : Please,How do I calculate the height of a triangle when I only know the width of the base line,It is 2.4 mtrs. Thankyou very much. Penny Nom lui répond. 





The integral of a to power x squared 
20090428 

JIM pose la question : WHEN I ATTENDED U.OF T. (TORONTO ) MANY YEARS AGO
WE WERE TOLD THE FOLLOWING INTEGRAL COULD NOT BE
SOLVED : a to power x squared . is this still true ?
CURIOUS , JIM Robert Dawson lui répond. 





An impossible trig problem 
20090314 

Alisha pose la question : If csc theta = 3 and sec theta = square root of 3, what are the values of tan theta and cos^2 theta? Harley Weston lui répond. 





9(d+5)=3(d3)+6d 
20080619 

davontay pose la question : 9(d+5)=3(d3)+6d Harley Weston lui répond. 





How many people are in the race? 
20060407 

Marty pose la question : You're in a race with 1/5 of the racers ahead of you and 5/6 of them behind you. How many people are in the race? Penny Nom lui répond. 





sin(kx) = x 
20051020 

David pose la question : What is an integer value for k so that sin(kx) = x has exactly 2005 solutions? How does one arrive at the answer? Harley Weston lui répond. 





An isosceles triangle...with 
20050423 

Shannon pose la question : If given an isosceles triangle...with
Is there any possible way to do this, without knowing a side, if so, please
explain in detail. Chris Fisher lui répond. 





A schedule for 6 teams 
20040910 

Greg pose la question : I have a schedule I need to make of 6 teams. They must play each other once however no team can be the away team twice in a row. There must be 3 home games and 3 away games for each team. Penny Nom lui répond. 





Integrating e^sin(x) 
20040804 

A student pose la question : I need to know that how to solve the integral " e^sin x", Harley Weston lui répond. 





The area of a lot 
20040309 

Dave pose la question :
If our lot is 192.71 x 138.79 x 158.74 x 103.08
Question is what percentage of an acre is our lot?
Penny Nom lui répond. 





Tapes and CD's 
20001022 

Arnold pose la question : Nicole has 25 CDs and tapes altogether. When she tries to pair them up, she has 4 CDs left over. How many tapes does Nicole have? Penny Nom lui répond. 

