BrainBashers - Random Puzzles

Puzzle 281

What are the next three characters in this sequence:

2 · 1 · F · 1 · 1 · F · 0 · 1 · F · 9 · F · ?

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Puzzle 282

Which letter comes next in this sequence:

A · K · Q · J · ?

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Puzzle 283

What am I?

I'm amazing 'cause I've got the force To hold down a cow or a horse As you've doubtlessly found, I am always around, And I'm constantly working, of course.

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Puzzle 284

Which is larger:

seconds in a week minutes in a year

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