Kelvin C from GTA asks
Why is it that when calculating the volume of a pyramid, such as a cone, you always have to divide...
Peter Schmuecking from Roetgen nr Aachen/Germany asks
My son, 13 y, has found a really good idea to prove the four colour map problem without computers,...
Jackson from Imphal asks
In my algebra, I learn that (-3 X -2) = +6 but (-3 X +2) = -6, why?
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