A pendulum clock gives correct time at the equator. Will it gain or lose time if it is taken to the poles? If so, why?

Explanation

When a pendulum clock showing correct time at equator is taken to poles then it will gain time.
Acceleration due to gravity at poles is high. Time period of pendulum `T=2pisqrt(l/g).`
When g increases T decreases. So number of oscillation made in given time increases hence clock gains time.