exam Maths Puzzle Numerical Ability

4log2 x + log2 5 = log2 405

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exam Other Question

A mixture of birdseed contains sunflower seeds worth $1.30 per kilogram and other seeds worth #0.90 per kilogram. How many kilograms of each kind must be used to produce 100 kilograms of mixture that sells $1.00 per kilogram? ABCD is a rectangle in which AB = 16cm, AC = 20cm and AE is the perpendicular from A to BD. Find the lengths of AD and AE.