exam Maths Puzzle Numerical Ability

This is so complicated the sum of two numbers is 77 The second is 5 times more than 3 times the first.What are the two numbers? I do not understand

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exam Other Question

Rewrite with a rational exponent.
root:3:18
Simplify Find the first five outputs of the following recursively defined function:

f(1)=8,(thats given) f(n+1)=-f(n)+6

its not really a permutation but i didnt know what category to put it in