exam Maths Puzzle Numerical Ability

On the written portion of her driving test, Sara answered 84% of the questions correctly. If Sara answered 42 questions correctly, how many questions were on the driving test?

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exam Other Question

Find the Inverse:

f(x)=( 1/2 )[ 10^(x-1)+5]

book answer: log(2x-10)+1 1) An open-top box is to be constructed from a 6 foot by 8 foot rectangular cardboard by cutting out equal squares at each corner and the folding up the flaps. Let x denote the le