exam Maths Puzzle Numerical Ability

14. 12a to the power of 3b to the power of 2, 18a to the power of 2 b to the power of 3, 6a to the power of4 b to the power of4

42. 4s + 6st - 14st2

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exam Other Question

A radio shop stocks 2 types of radio type P and Q. It can sell atleast 3 times as many type P as Q but there is only enough room to store 32 radios total. If profit of pounds 20 is I'm having difficulty in setting up this problem. I'm not sure if I should use a generating function or binomial coefficients. I'm thinking it would be easier to solve with a gen