Riddles with Answers, Hints & Explanations

Mr. Smith has 4 daughters. Each of his daughters has a brother. How many children does Mr. Smith have?

What invention lets you look right through a wall?

Is an older one-hundred dollar bill worth more than a newer one?

What gets broken without being held?

In a certain country ½ of 5 = 3. If the same proportion holds, what is the value of 1/3 of 10 ?