What is the fastest thing in the universe?
a) Gravitational waves
b) Cosmic rays
c) Light
d) Blazar jets (more…)
Which is the tallest building in the world?
a) Burj Khalifa
b) Shanghai Tower
c) Makkah Royal Clock Tower
d) Lotte world tower (more…)
Which is the largest river in the world by length?
a) Nile River
b) Amazon River
c) Yangtze River
d) Mississippi River (more…)
Which is the largest city in the world by population?
a) New Delhi
b) Dhaka
c) Karachi
d) Tokyo (more…)
Which is the largest island in the world?
a) Borneo
b) Madagascar
c) Baffin Island
d) Greenland (more…)
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