exam Maths Puzzle Numerical Ability

x^2-7x-30=0

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exam Other Question

5) Logarithms:

a)Using a calculator, find log 1000 where log means log to the base of 10.
Answer:

b) Most calculators have 2 different logs on them: log, which is base 10 A 2000L tank containing 550L of water is being filled with water at the rate of 75L per minute from a full 1600L tank. How long will it be before the two tanks have the same amount of water?