A young woman in Manhattan has two boyfriends - one in the Bronx and one in Brooklyn - both of whom she likes equally well.
To visit the boyfriend in the Bronx she takes the subway from the uptown side of the platform; to visit the boyfriend in Brooklyn she takes the subway from the downtown side of the same platform.
As she likes them both equally well, she simply takes the first train that comes along. Brooklyn and Bronx trains run equally often from this platform - every ten minutes - and are equally reliable. Yet for some reason she finds herself visiting the boyfriend in Brooklyn nine times out of ten. Why?

1/ Make 24 out of 1, 5, 5, and 5.
2/ Make 24 out of 3, 3, 8 and 8.

You have three boxes of fruit. One contains just apples, one contains just oranges, and one contains a mixture of both. Each box is labeled -- one says "apples," one says "oranges," and one says "apples and oranges." However, it is known that none of the boxes are labeled correctly. How can you label the boxes correctly if you are only allowed to take and look at just one piece of fruit from just one of the boxes?

1/ Make 4 out of 2,5,6 and 8.

2/ Make 40 out of 4,6,8 and 8.