exam Maths Puzzle Numerical Ability

the paint in a certain container is sufficient to paint an area equal to 9.375 meter square.how many bricks of dimensions 22.5cm*10cm*7.5cm can be painted out of this container?

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exam Other Question
The reciprocal of 7 is 1/7 since their product is 1 ( 7 * 1/7 = 1) The question I need to answer is "are the reciprocals of 7 and -7 opposites".

The reciprocals of 7 and -7 are 1/7 and - 1/7

Are 1/7 and -1/7 opposites? By adding or subtracting, how would you write this in lowest terms?

5/3x+7/3x