book Maths Puzzle Numerical Ability

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given x < 0 and abs(x-1) < 3, state the interval in which x must lie

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book Other Question

pencils at the school bookstore cost 8 cents each. stacy buys 3 pencils and her brother buys 4 pencils. wat is the total cozt of the pencils Simplify: 25a^4 - 25b^4 / 5a^4 - 5b^4