Flashcards · 40 cards in 6 decks
Active recall drill
Click a card to flip it. Say the answer out loud before you flip — that is what makes this work. Shuffle for a harder run.
Rapid-fire number drill
Cover the right column. These are the numbers most often asked.
| Question | Answer |
|---|---|
| Latitude of the Equator | 0° |
| Latitude of the poles | 90°N / 90°S |
| Longitude of the Prime Meridian | 0° |
| Maximum longitude | 180° |
| Year the Prime Meridian was fixed | 1884 |
| Degrees the Earth turns per hour | 15° |
| Hours for one full turn | 24 |
| Degrees in a full turn | 360° |
| IST ahead of GMT by | 5 hours 30 minutes |
| Longitude of the Ujjayinī meridian | about 75.8°E |
| Varāhamihira lived about | 1,500 years ago |
| Time zones in the USA | 6 |
| Time zones in Russia | 11 |
| Watch resets crossing Russia | 10 |
| Longitude of the International Date Line | about 180° |