book Maths Puzzle Numerical Ability

Hi, my name is virna and im really not sure where this question is catogorize under, but here's my question: What is the Additive inverse of a number and also, what is the absolute

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what is th answer to x+2=4 how do u solve it ? Four married couples enter a restaurant. How many ways can they be seated at a round table so that the men and women alternate and no husband and wife sit next to each other. (As