exam Maths Puzzle Numerical Ability

i really need help on my math i have an F on my math so ill give my first answer!
8 to the power of 13 over 8 to the power of 10

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exam Other Question

y^2-5y=0 the problem is: Find the next term in the sequence 1/2, -4, 32 _

I believe the answer to be -256

could someone please tell me if I am correct?