exam Maths Puzzle Numerical Ability

How do i evaluate the following:

log3 81
log4 256
log2 (1/32)
log5 1
log3 (-1)

Please help
thanks
Lucy

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exam Other Question

Can you please help me with this?



-36+2w=-8w+w
Can someone help me on this problem?

I need t solve the system by addition:

x + y = 6
x - y = 4

Thank you,
Lisa