If log V + log 3 = log π + log 4 + 3log r, find V in terms of other quantities.
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If x = log1012, y = log42 × log109 and z = log100.4, find the values of
(i) x - y - z
(ii) 7x - y - z
Given 3(log 5 - log 3) - (log 5 - 2log 6) = 2 - log n, find n.
Given that log10y + 2log10x = 2, express y in terms of x.