Test: Logarithm- 4
15 Questions MCQ Test Quantitative Aptitude (Quant) | Test: Logarithm- 4
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If 2 [log (x + y) - log 5] = logx + logy, then what is the value of x2 + y2?
Log 32700 = log 3.27 + log 10000 = log 3.27 + 4
log10 125 = log10( 1000/8) = log. 1000 - 31og2 = 3 - 3 x 0.301 = 2.097
log153375 x Log41024 = 3 log151 5 x 5 log4 4 = 3 x 5 = 15.
1/2 log625 5 = [1/(2 x 4)] log55 = 1/8.
3 log 5 + 2 log 4 - log 2
= log 125 + log 16 - log 2
= log (125 x 16)/2
= log 1000 = 3.
1/10 = 12 - x => x = 11.9
x log 2 = 3
log 2 = 3/x.
Therefore, x = 3/log 2
x = log510 = l/log105 = 1/log 5.
log x = log (7.2/2.4) = log 3 ⇒ x = 3
log x = log 25 + log 8 = log (25 x 8 ) = log 200.
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