What child is this?

On his trip to Great Britain, George Bush had a meeting with Queen Elizabeth.
He asked her, 'How does one manage to run a country so smoothly?'
That's easy,' she replied, 'You surround yourself with intelligent ministers and advisors.'
'But how can I tell whether they are intelligent or not?'
You ask them a riddle,' she replied, and with that she pressed a button and said, 'Would you please send Tony Blair in?'
When Blair arrived, the Queen said, 'I have a riddle for you to answer for me. Your parents had a child and it was not your sister and it was not your brother. Who was this child?'
Blair replied, 'That's easy. The child was me.'
'Very good,' said the Queen. 'You may go now.'
President Bush went back to Washington and called in his chief of staff Karl Rove. He said to him, 'I have a riddle for you, and the answer is very important. Your parents had a child and it was not your sister and it was not your brother. Who was this child ?'
Rove replied, 'Yes, it is clearly very important that we determine the answer, as no child must be left behind. Can I deliberate on this for awhile?'
'Yes,' said Bush, 'I'll give you four hours to come up with the answer.'
So Rove went and called a meeting of the White House staff, and asked them the riddle. But after much discussion and many suggestions, none of them had a satisfactory answer. So he was quite upset, not knowing what he would tell the President.
As Rove was walking back to the Oval Office, he saw former Secretary of State Colin Powell approaching him. So he said, 'Mr. Secretary, can you answer this riddle for me? Your parents had a child and it was not your sister and it was not your brother. Who was the child?' 'That's easy,' said Powell, 'The child was me.'
'Oh thank you,' said Rove. 'You may just have saved me my job!'
So Rove went into the Oval Office and said to President Bush, 'I think I know the answer to your riddle. The child was Colin Powell!'
'No, you idiot!' shouted Bush. 'The child was Tony Blair!'

Teasers

Question: If a durian and a coconut were to fall on your head, which would hurt more?

Question: Would you stir your coffee with your right hand or left hand?
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You are in a game show on television. On this game show the idea is to win a car as a prize. The game show host shows you three doors. He says that there is a car behind one of the doors and there are goats behind the other two doors. He asks you to pick a door. You pick a door but the door is not opened. Then the game show opens door that you did not pick to show a goat (because he knows what is behind the doors).
Then he says that you have one final chance to change your mind before the doors are opened and you get a car or a goat. So he asks you if you want to change your mind and pick the other unopened door instead. What should you do?

Are the odds of you winning the car higher, lower or the same if you change your mind and pick the other door?

Where'd the money go?

Three men walk into a restaurant for a set lunch. After their meal, they each hand over $10 to the waiter, which was the price of the meal. There were no additional charges or taxes. The owner was feeling rather generous that day and decided to charge the three men only $25, instead of the usual $30. So he instructed the waiter to return $5 to the men. The shrewd waiter thought it was inconvenient to split $5 equally among the three men, and decided to pocket $2 for himself. He duly gave $1 to each of them. Since the men eventually paid $27, and the waiter took $2, what happened to the missing dollar?
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This one still had me stumped momentarily three years on. Who can solve this?