exam Maths Puzzle Numerical Ability

2/5a=6 2/5

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exam Other Question

Hello out there,I need some help with some tough problems,the first one is,Simplify:3/x+x+3/y.The next one is,Find the LCD for 3/w and 4/w^2.The third one is,Find the LCM for x^2+3 Choose the one alternative that best completes the statement or answers the question. Approximate the number using a calculator. Round your answer to three decimal places.
3-3.4