exam Maths Puzzle Numerical Ability

(4 / x^6) ^3 I need to simplify it and I am pulling my hair out. Maybe I am too old for this! Can you possibly show me a detailed explanation?

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exam Other Question

I need to check this answer...In a parallelogram, the ratio of a side to its altitude is 2:1. If the Area is 800sq', find the altitude. Would it be 20'? A number increased by 20% is 16. Find the number.