exam Maths Puzzle Numerical Ability

If f(x) = 2x^2 - 7x + 3 find : f(2) and f(-3)

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exam Other Question

In studying the emission of light, in order to determine the angle at which the intensity is a giving value, the equation sin^2(A) - 4sin(A) + 1 = 0 must be solved. Find the angle A (to 0.1 of a degree). (sin^2(A) = (sinA)^2. A number between 300 and 400. If it is divided by 2, the remainder is 1. If it is divided by 4,6, or 8, the remainder is 3. If it is devied by 10, the remainder is 5. If t divided by 3,5,7, or 9, the remainder is zero. What is the number?