exam Maths Puzzle Numerical Ability

The larger of two numbers exceeds twice the smaller by 17. If the larger number is divided by the smaller number, the quotient is 3 and the remainder is 7. Find the two numbers

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exam Other Question
a plumber charged $110 for a three hour job and $160 for a five hour job. At this rate, how much would he charge for an eight hour job.

need help. have tried. my answer was $200. please correct me if i am wrong What is the answer to this question:
square root 20 - square root 5 + 4 square root 8
I tried this:
2 square root 5 - square root 5 + 8 square root 2
square root 5 + 8 square root 2
9 square root 10
18 square root 5