







The average height of a wall 
20190815 

From Jeff: Trying to figure the average height of a sloped foundation wall.
The lowest point is 24 inches or 2 feet.
The highest point is 116 inches or 9’ 8 inches.
Can this be figured without the degree of slope or can we assume it is
Equaled sloped from point a to point b. Thanks Answered by Penny Nom. 





The area of a shape 
20190814 

From Lymp: Hi, for math we are calculating the area of shapes and my teacher wanted me to research how to calculate the area of shapes so i was wondering if you could tell me how t calculate the area of any shapes. Please tell me how to calculate a cross, parallelogram and a polygon Answered by Penny Nom. 





A cone of maximum volume 
20190814 

From Refilwe: The slant height of a cone is 10cm. Determine the radius of the base so that the volume of the cone is a maximum Answered by Penny Nom. 





The radius of a circle of given area 
20190814 

From shelby: What's the radius of a circle that has an area of 803.84cm2? I also need examples of how you got the answer. Answered by Penny Nom. 





Conversing from tons to cubic yards 
20190803 

From Kathleen: Is there a simple formula to convert the following from tons to cubic yards:
Topsoil
Sand base
Fill dirt Answered by Penny Nom. 





Filling a hole 
20190801 

From Jackie: Filling a hole 25ft round 3ft deep how much dirt is needed? Answered by Penny Nom. 





A combination lock 
20190801 

From markbo: A combination lock has 09 plus Y on its keypad. A code is generated by selecting
4 digits from those keys (09 and Y) with no repeated choices,
but sequence does not matter
(i.e. 1234 is the same as 4321, and the same as 3412 and counts as one combination)
How many different 4digit codes are possible in this scenario? Answered by Penny Nom. 





Combination lock 
20190731 

From Antony: Hello.
So my 3yr old daughter has had a bit of a play with the 3 dial combination lock on my backpack and locked it closed.
I am looking for all the possible combinations to go through a process of elimination to find the combination she has set.
To be clear. There are three dials, each with the numbers 09. I have read 10x10x10=1000 options but not sure if that is correct .. feels too small?
Many thanks in advance. Answered by Penny Nom. 





Six digit numbers from 4 digits 
20190730 

From Tab: How many six digit combinations can be made from the numbers zero, two, five, eight? With repetition of numbers Answered by Penny Nom. 





The volume of a well 
20190730 

From Jordan: How much water could my well hold if the depth of the well is 30 feet
feet and the diameter of the well is 24 feet ? Answered by Penny Nom. 





A problem involving ratios 
20190724 

From Dhanendra: A plot reserved for playground in the ratio of length and breath 11:4 gram panchayt spends rupees 45000 for boundary at the rate of 100 per m. Find the dimensions of the plot. Answered by Penny Nom. 





Packing chocolates in boxes 
20190722 

From CHESKA: 1.levy can pack the chocolate bars either with 35 bars in a box,with 42 in a box, or with 49 in a box. what is the least number of chocolate bars that he has?
2. the blue light of a Christmas light blinks every 2 second. the red light blinks every 3 second and the yellow light blinks every 5 second. how many times will the three lights blink at the same tims in one hour?
3.a wooden straightedge can exactly measure an 825 cm rope, a675 cm rope, and 375 cm rope. what is the least possible length of the straightedge? how many times will it measure each rope? Answered by Penny Nom. 





Listing three digit combinations 
20190717 

From Larry: Using numbers 09, what are all the possible combinations of choosing 3 numbers regardless of order and no 3 numbers being used more than 2 times in the combination. So no 1,1,1, 2,2,2, 3,3,3 etc. Order does not matter. Could you please send me a listing of all those combinations? Answered by Penny Nom. 





Three digit codes 
20190714 

From Jessica: I need to find the total number of 3 digit codes using the digits 1 through 9. How many of these codes would be odd numbers, and how many even? Answered by Penny Nom. 





The maximum volume of a cone 
20190714 

From A student: find the maximum volume of a cone if the sum of it height and volume is 10 cm. Answered by Penny Nom. 

