In what location on earth could an eager math student not use her solar-powered calculator at any time at all during the course of a day in June? Quiz Answer

In what location on earth could an eager math student not use her solar-powered calculator at any time at all during the course of a day in June?

The Correct answer is South Pole

In June, a math student couldn't use a solar calculator at the South Pole because there's no sunlight for 24 hours. This happens because of how the Earth tilts as it goes around the sun. Solar calculators need sunlight to work, so they might not be good indoors where it's dark.