exam Maths Puzzle Numerical Ability

I do not understand this?

Express 50(ten) in binary, trinary and base 4.

thankyou Danielle

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exam Other Question

Can someone help me on the following problems. I would greatly appreciate it.
Thank you

x+3/x+6=x-5/x+2

x/x-1+5/x+1=3x/x^2-1

7/x-4+1/x+4=-5x/x^2-16 Graph the following equation a table of values. y=-2x+3