Country Flags that are Yellow, Red and Green Only

Name the twenty countries whose residents have the lowest median age.

Evil aliens have decided to kill everyone on Earth! Fortunately, they've given you two minutes to save as many as you can. All you have to do is name a country to save everyone in it.

Click the countries that border China but don't make any mistakes or your social credit may be affected!

Click all the superheroes that come from Marvel comics while avoiding the ones that don't.