book Maths Puzzle Numerical Ability

Find the quotient, write the answer in standard form.

(8-4i)/(5-2i)

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book Other Question

Can you please help with the following? A work crew of 3 people requires 3 weeks and 2 days to do a certain job. How long would it take a work crew of 4 people to do the same jo what is the smallest number that is divisible dy four different primes?Why or why not?