exam Maths Puzzle Numerical Ability

pls can you help me check my answer....

log(little8)2 i came up with my answer 1/3

am i right

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exam Other Question

simplify (3x-1y-2)

the -1 and -2 are exponents i just dont know how to type them in please help
2^2x - 12(2^x) + 32 = 0

I know the answers are 2 and 3 but I do not know how to prove it algebraically