exam Maths Puzzle Numerical Ability

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"The exact average of a set of six test scores is 92. Five of these scores are 93, 95, 96, and 88. What is the other test score?"

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exam Other Question
Perform indicated operations

(x^2-11x+4)-(-2x^2+2x-6)-(X^2+6x-5)

Completely lost again! Thanks simplify: 3 square roots of(2/7) - 5 square roots of(7/2) + 3 square roots of 56.