[quote=jIO]They are part of triplets or quadruplets!

[/quote]
right,

here's the answer to your second teaser:
Use 6 9's to make 100 using oprations (+ - x /)
[b](9*9)+(9+9)+(9/9) [/b]= 100

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try this:
John, Smith, and James are in a competition. Here are their results:
1. The youngest person received the least points.
2. John got half of the points of the eldest.
3. Smith received as many points as both others combined.
Question:
Who is the eldest ? and how can you tell if he is the eldest?
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i encounter this in a math quiz bee contest