exam Maths Puzzle Numerical Ability

the chairs for a concert are arranged so that each row has the same number of chairs. sarah has 4 chairs in front of her, and 8 chairs behind her. there are 5 seats to her left and 6 to her right. how many chairs are set up?

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exam Other Question
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased towards heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it? FACTOR THESE Completely? :


1) 6x^2 - 28x + 16


2) x^4 + 2x^3 - 3x - 6


3) x^8 - 1