What English word has three consecutive double letters?

Find the smallest sentence with all the English alphabet.

Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Find the missing number in the image below.

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?