Two days ago, I posted Okay for a Fifth-Grader?
Five Triangles said, "We posed the question slightly differently, our diagram providing an
important hint to bring it to a more manageable level for younger
What do you suppose the "important hint" was?
Sunday, October 19, 2014
Saturday, October 18, 2014
Why does this question not require a calculator?
When the integers from 1 to 30 are multiplied, determine how many consecutive digits starting from the ones (1s) position are zeros.
Would this be a fair question for some standardized test?
Friday, October 17, 2014
Thursday, October 16, 2014
"The sum of two positive integers is 216. The greatest common factor of the two numbers is 24. What are all the possible pairs of numbers?"
What approach seems the easiest here?
I can see using solution methods such as:
- guess and check
- organized list
- visual representation
Which of the two sentences eliminates the most numbers?
The sum of 2 pos int is 216 and their gcf is 24. Find all possibilities.
— David Marain (@dmarain) September 24, 2014
Wednesday, October 15, 2014
Tuesday, October 14, 2014
|One possible arrangement.|
Find the net for the rectangular prism with the largest volume that you can make from a standard piece of paper (8.5" x 11"). Use whatever net arrangement of sides you prefer, but it has to be one connected net. (No loose pieces).
Find the sizes of the six rectangular pieces that form the rectangular prism with the largest volume that can be made from a standard piece of paper (8.5" x 11").
Monday, October 13, 2014
What arrangement of rectangles seems to work best to cover it with no waste?
Which set of rectangles covers the prism with the largest possible volume?
"Find the sizes of the six rectangular pieces that can be made from a standard piece of paper (8.5" x 11") that that will cover the rectangular prism with the largest volume."