exam Maths Puzzle Numerical Ability

Simplify (3x^3y)^2

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exam Other Question

What is the name of an equiangular polygon if the ratio of the measure of an inerior angle to the measure of an exterior angle is 7:2? A and B can do a piece of work in 42 days, B and C in 31 days and A and C in 20 days. In how many days can all of them do the work?