exam Maths Puzzle Numerical Ability

2^31*4^31*5^62*7^31*8^93=y

When I tried to solve the problem using an online calculator and got strange results. For example, I entered eight to the ninety-third power and got,

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exam Other Question
6X-9Y+3Z
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3

WOULD I BE CORRECT IN THINKING THAT WOULD BE 2X-3Y+Z?

THANKS!</PRE> Solve the equation.
18) -0.04 y + 0.12(500 - y) = 0.09y