Geometry
posted by Jordan .
I have to write a conjecture now, and am not sure if I am phrasing it right.
Here is what I have.
The product of a number multiplied by 101 will always end in the number it was multiplied by.
Is this correct?

5*101 = 505
10*101 = 1010
20*101 = 2020
50*101 = 5050
That statement looks good to me although you may want to work on the wording a little. The product ends in 5, 10, 20, and 50 respectively and those are the numbers by which 101 were multiplied. How about, "Any number multiplied by 101 will always end in that number." 
Many, many thanks! Feeling less like an idiot with each question.
