Show that one and only one out of n, n+2, n+4 is divisible by 3, where n is any positive integer.
Question
AB,CD,PQ are perpendicular to BD.AB=x,CD=y and PQ=z,prove that 1/x 1/y=1/z.
How can i find remainder class 9th 2.3 question first ka 5th by long devision method.