exam Maths Puzzle Numerical Ability

What is the value of log 1000 + 2log3 9-log5 125? Where 3 and 5 are the base perspectively.

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exam Other Question

A concrete driveway measures 18 yards by 4 yards. The driveway will be 0.5 yards thick. (a) How many cubic yards of concrete will be needed? (b) How much will it cost if concrete is $3.50 per cubic yard? Factor Completely:
6x^2-7xy-5y^2