exam Maths Puzzle Numerical Ability

I need help with this problem, it is multiplying and dividing factorials.

In case you cannot tell:
/= Division
= Multiplication

6!/2!4! 5!/4!1!

Thank you!

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exam Other Question

Find the vertex and the axis of symmetry for the parabola with the given equation.
y=5x^2-30x+47 A function f(n) defined for all positive integers has the property that f(m)+ f(n) = f(mn) for any two positive integers m and n. If f(2) = 7 and f(3) = 10, then calculate f(12).