book Maths Puzzle Numerical Ability

what are some numbers between 0 and 1

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book Other Question

Please help with this problem. -18x^10y^-6z divided by 12y^0z.
I believe -18 moves to the denominator. Does the x^10 stay as numerator?
The denominator of 12^y0, is that Solve the following equation for A:

AC - 2AB = 3BC

I have no clue. Any help is greatly appreciated. Thank you