exam Maths Puzzle Numerical Ability

(a^3/b^2)^4=

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exam Other Question

Please help me solve this problem:
9/10=k+7/10

Thanks,
Amy n how many ways can Al, Bob, Carlos, Don, Ed, and Fern be seated in a row of six seats if Al and Bob are not to be seated side by side? [Hint: Either Al and Bob will be seated side by side or they will not be seated side by side.]