We all know that,
g = (G.M)/R2
g ∝ 1/R2
From this, we conclude g is inversely proportional to the square of the radius of any heavenly body. In the equator, the radius is longer than that in the pole. The longer the radius, the less g. So, there is a higher g at the pole than that in at the equator.
So, the weight of any body will increase, if it is taken from equator to pole becasue we have W = mg where mass remenins constant.