exam Maths Puzzle Numerical Ability

Describe the pattern and list the next three numbers:

1, 8, 27, 64, _, , _____

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exam Other Question

I have to tell whether the equation represents a direct, join, or inverse variation and then name the constant:

n/m=1.5

I think it is direct and the constant is 1.5

Next o 1-2cosL+cos2L= ?
L is alpha and please if anyone can explain it to me i would be grateful.