| Equation | Answer | Working out |
| Island nations in the Mediterranean Sea + Island nations in the Persian Gulf | |
| Oceans on Earth (including Southern Ocean) x Continents on Earth | |
| Stars on the flag of Australia - Stars on the flag of Vietnam | |
| Size of the Vatican City in square km (to 2 dp) + Size of Monaco in square km (to 2 dp) | |
| Year Kosovo gained independance - Year of United States Declaration of independance | |
| Countries that border Germany x Countries that border Russia (including Kaliningrad Oblast) | |
| Hills of Rome x Great Lakes of America | |
| American States + Counties of England | |