Friday, August 14, 2026

These are the 10 questions BrainRank served to the whole world on Friday, August 14, 2026 — now over, with every answer revealed and explained. Reading time only; the score no longer counts.

1. math

   A shirt costs $40 and is marked 25% off. What is the sale price?

   • $25
   • $32
   • $35
   • $30

   Answer: $30

   25% of 40 = 10; 40 − 10 = 30.

2. geography

   Lake Baikal, the world's deepest freshwater lake, is located in which country?

   • Mongolia
   • Kazakhstan
   • China
   • Russia

   Answer: Russia

   Lake Baikal is in southern Siberia, Russia.

3. geography

   What is the capital of Greece?

   • Thessaloniki
   • Patras
   • Athens
   • Heraklion

   Answer: Athens

   Athens is the capital of Greece.

4. mythology

   In Greek mythology, what is the name of the three-headed dog that guards the underworld?

   • Chimera
   • Argus
   • Cerberus
   • Orthrus

   Answer: Cerberus

   Cerberus, the three-headed hound, guards the entrance to the Greek underworld.

5. science

   What is the chemical symbol for hydrogen?

   • H
   • Hy
   • Hd
   • Hg

   Answer: H

   H is the chemical symbol for hydrogen.

6. mythology

   In Greek mythology, which Titan was condemned to hold up the sky?

   • Cronus
   • Prometheus
   • Atlas
   • Oceanus

   Answer: Atlas

   Atlas was condemned to hold up the sky - often misremembered as holding up the globe.

7. nature

   What is the largest species of big cat in the world?

   • Tiger
   • Lion
   • Leopard
   • Jaguar

   Answer: Tiger

   The tiger is the largest living cat species.

8. everyday-science

   What causes the sound of thunder?

   • Clouds crashing together
   • Wind hitting mountains
   • Air rapidly heating and expanding around a lightning bolt
   • Rain striking the ground hard

   Answer: Air rapidly heating and expanding around a lightning bolt

   Thunder results from the rapid expansion of air superheated by a lightning strike.

9. everyday-science

   What is the process by which plants lose water vapor mainly through their leaves?

   • Respiration
   • Transpiration
   • Digestion
   • Germination

   Answer: Transpiration

   Transpiration is the loss of water vapor from plant leaves.

10. nature

    What is the scientific study of birds called?

    • Ornithology
    • Entomology
    • Botany
    • Ichthyology

    Answer: Ornithology

    Ornithology is the study of birds.