







The dimensions of a rectangle 
20180303 

Mia pose la question : A wire of length 36cm is bent to form a rectangle.
Find the dimensions of the rectangle. Penny Nom lui répond. 





Some 5 number sets 
20180302 

Sarah pose la question : Hello! My question is:
If I have 5 columns of numbers, and I want to create all possible combinations
(or is it permutations?) How can I do that? For example all numbers in each
column may not appear in any other column. so:
column 1: 1,2,3,4,5
column 2: 6,7,8,9,10
column 3: 11,12,13,14,15
column 4: 16,17,18,19,20
column 5: 21,22,23,24,25
how may I determine all the possible ways I can get sets of 5 out if this? Thanks! Penny Nom lui répond. 





Expand (5x9)(5x+9) 
20180301 

adil pose la question : expand the following:
(5x9)(5x+9) Penny Nom lui répond. 





Aspect ratio 
20180301 

brad pose la question : can you help me find the width if I know the length and aspect ratio of a object?
length = 78
aspect ratio = 1.42
width=?
length = 107
aspect radio= 2.02
width= ?
thank you Penny Nom lui répond. 





An item on sale costs 55% of the original price. 
20180228 

Debra pose la question : An item on sale costs
55%
of the original price. The original price was
$51
. Penny Nom lui répond. 





Parents, grandparents, great grandparents, ... 
20180228 

jessica pose la question : every person has 2 birth parents, 4 birth grandparents, and so on. These people are known as ancestors. How many ancestors does a person have in each generation? write in exponential form. 3ed generation, greatgrandparents? 4th generation? 10th generation? Penny Nom lui répond. 





Is a rectangle a parallelogram? 
20180228 

ellie pose la question : is a rectangle a parallelogram? Penny Nom lui répond. 





The limit of (e^x1)^(1/x) as x tends to 0 
20180227 

ARGHA pose la question : Find the limit of (e^x1)^(1/x) as x tends to 0. Penny Nom lui répond. 





A cyclist reduces his speed 
20180227 

Katherine pose la question : Suppose the winner had reduced his average cycling rate by .1 mile per hour.
By how much would his time have changed?
(the cyclist's rate is 23.66 miles per hour and the answer to the question before this
one was that he cycled 2,292 miles in 96.87 hours) Penny Nom lui répond. 





A four digit pass code 
20180226 

Jessica pose la question : I was trying to fond out how many combinations could there be for a four digit pass code to a phone when no numbers are repeated? Penny Nom lui répond. 





Billions and trillions 
20180225 

Sheila pose la question : How many 50 billion equal 100 Trillion ?
How many 20 billion equal 100 Trillion?
How many 500 million equal 100 Trillion?
How many 50 million equal 100 Trillion?
How many 50 thousand equal 100 Trillion? Penny Nom lui répond. 





$525 is shared among three friends 
20180225 

Iyanla pose la question : If $525 is shared among three friends: Paul Katherine and Brandon so that Paul gets $15 less than Brandon and Katherine gets 4 times as much as Paul, how would I solve this equation? Penny Nom lui répond. 





The perimeter of a square 
20180225 

Alicia pose la question : What's the perimeter of a square with 441cm square Penny Nom lui répond. 





Multiplies and factors 
20180224 

Lil pose la question : Is a multiple the same as a factor? Penny Nom lui répond. 





Dividing a region in half 
20180224 

mandy pose la question : There is a line through the origin that divides the region bounded by the parabola y=4x−5x2y=4x−5x2 and the xaxis into two regions with equal area. What is the slope of that line? Penny Nom lui répond. 

