exam Maths Puzzle Numerical Ability

Please show me how to solve:

(100p-4000)/100p=.3

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exam Other Question

State whether each sequence is a geometric sequence. If so, state the common ration and list the next three terms.

9, 3, -3, -9, ..... what is the complete solution of logb2m-logbX^3..... hope u understand the equation...