The marathon man timed himself and found out that if he wore a bright white outfit he ran 20 miles in 80 minutes but when he wore a dark outfit he ran 20 miles in one hour and twenty minutes. What does this mean for his next race?

Absolutely nothing as 80 minutes equals an hour and twenty minutes

Two planes take off at the same exact moment. They are flying across the Atlantic. One leaves New York and is flying to Paris at 500 miles per hour. The other leaves Paris and is flying to New York at just 450 miles per hour.Which one will be closer to Paris when they meet?

They will both be the same distance from Paris when they meet!

A worm is in a ten foot hole. Every day he goes up two feet and drops down one. How many days will it take for the worm to get out of the hole?

Nine Days

Which is correct: ‘9 and 6 is 14′ or ‘9 and 6 are 14′?

Neither… 9 plus 6 is always 15.

Jenna wrote all the numbers from 300 to 400 on a piece of paper. How many times did she write the digit 3?

Jenna wrote it 120 times.

There are four girls and four apples in a basket. Every girl takes an apple yet one apple remains in the basket? How is this possible?

The answer is that one girl took the basket. She took the last apple while it was in the basket.

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Nine Years