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Maths Puzzle
Numerical Ability
A water balloon is dropped from a cliff. Exactly 3 seconds later the sound of the balloon hitting the ground reaches the top of the cliff. How high is the cliff?
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book Other Question
simplfy the expression (1/x-1/b) / (1/xb + 1/2).
i get x-b/2xb but i am not sure i am right.
X/3 + 1/6 (less than or equal to) 2x + 3/2