Known answer: no
Now, what could be the question and solution? If you're reducing salt intake, are olives a healthy snack?
The average amount of sodium a healthy person should have is 2,300mg daily. A half cup serving of olives has an average of 735mg sodium in it.

Known answer: no
Now, what could be the question and solution? Is grief always obvious when it is being experienced?
Grief has no set external representation. People who are grieving may laugh, cry, or even seem angry.

Known answer: yes
Now, what could be the question and solution? Would it be possible to fit a football field in Alcatraz Island?
Alcatraz is 511 meters by 180 meters. A football field is 91 meters by 48 meters.

Known answer: no
Now, what could be the question and solution?
Is the Louvre in billionaire George Soros's price range?
The Louvre including all of its paintings has a value of around 45 billion. George Soros has a net worth around 8 billion as of 2020.