exam Maths Puzzle Numerical Ability

log64/log4, log64/log8, log64/log32

log49/log7, log49/log49, log49/log343

log125/log(1/5), log125/log(1/125), log125/log(1/625)

log512/log8, log512/log2, log512/log16

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exam Other Question

10=5x what is tha solution of 10=5/6x?
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6
evaluate each expression.

This is the problem I need help with:
((( (a/b)^2 + b^3 for a= 24 and b= -6)))