Question

how will the weight of an object of mass 100g change if it take from Equator to pole​

Answer 1

it weight will increase.
at pole weight is maximum and equator weight is minimum
but if you ask about mass it is constant mass never change it remain always constant

Answer 2

$\mathbb{\huge{\purple{HEY\:MATE}}}$

At equator due to increase in radius there will be decrease in gravity. this will result in low weight in equator as weight = mass*g. At pole is the opposite and the body and a body of same mass will weight more there .