What month of the year has 28 days?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

During which month do people sleep the least?

Can you write down eight eights so that they add up to one thousand?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

What can jump higher than a building?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?