exam Maths Puzzle Numerical Ability

Determine the measure of angle C of triangle ABC, given the following information:
B=45degrees, a=2 c=4

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exam Other Question

Oolong tea sells for $19 per pound. How many pounds of Oolong should be mixed with regular tea selling at $4 per pound to produce 50lb of tea selling for $7 per pound? How many positive divisors does 3^6 * 12^4 * 15^2 * 27^3 * 64^5 * 25^10 have?