







Factors 
20170816 

Gemma pose la question : Why do 315 and 525 have the same number of factors? Penny Nom lui répond. 





A 4 sided lot 
20170815 

Micheal pose la question : If one side of .4 acre is 25 feet what would the other three sides be Penny Nom lui répond. 





Two circles 
20170813 

Ladines pose la question : Find the equation of the circle passing through points of intersections of circles x²+y²=4y and x²+y²=2x and the center is on line y=2 Penny Nom lui répond. 





A rectangle and a circle 
20170812 

Ramzan pose la question : a diagram shows the shape of rectangular framework with length (2x+20)cm and with (y+10)cm . The outline is made of wire . If a circle with diameter 56 cm is to be made from the wire and the area of the rectangle is 420 square centimeter ,find the possible lengths and width of the rectangle Penny Nom lui répond. 





1 billion x 1 billion 
20170811 

Kona pose la question : 1 billion x 1 billion
1 trillion x 1 trillion Penny Nom lui répond. 





The perimeter of a sector of a circle 
20170811 

Alisa pose la question : find the perimeter of the sector with radius 7 cm in which the angle at the centre is 60 degrees leave your answer in terms of pi Penny Nom lui répond. 





Two digit numbers that contain 5 
20170811 

Irish pose la question : How many two digit numbers contain the digit 5? Penny Nom lui répond. 





(x18)/7=6 
20170808 

David pose la question : (x18)/7=6 Penny Nom lui répond. 





A pair of linear inequalities 
20170808 

Hempstone pose la question : Solve the inequalities 3x5<2x+5>4x+9 Penny Nom lui répond. 





Significant digits 
20170806 

Pat pose la question : The directions for a problem are: "Solve the problem, expressing your answer
using the correct number of significant figures."
Problem
0.0043 divided by 2.04
Answer before using the correct number of significant figures is
0.002107843
Is the correct number of significant figures the number below?
2107843
Pat Penny Nom lui répond. 





Teams of 4 from 20 people 
20170804 

Christopher pose la question : math team has 20 people on the team but only 4 can enter the competition. The team captain has to pick 4 of them but he knows that he cannot put James, Bill or Todd on the team with one another or there will be problems. what would the formula be to find the solution to how many possible team combinations the are Penny Nom lui répond. 





Ratios and proportions 
20170801 

khurram pose la question : what is ratio and proportion? please give a detailed note on this topic, i am really panic of these calculations Penny Nom lui répond. 





A lock with 3 tumblers 
20170729 

Carol pose la question : I have a lock that has 3 tumblers. The numbers are 0  9. I cannot recall what I set the combination to. How many combinations will there be with three numbers? Penny Nom lui répond. 





A 4 digit safe combination 
20170729 

Donna pose la question : I lost my safe combination :( it is 4 digit # with the last digit being 2.
I do not think the 1st digit is 1, 2 or 3
Can u help? Thank u :) Penny Nom lui répond. 





Factorials 
20170727 

dinesh pose la question : Is there any shortcut formula for multiply series numbers.
like
1x2x3x4x5.......x100 =? Penny Nom lui répond. 

