exam Maths Puzzle Numerical Ability

2/5 = x-2/20 solve for x

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exam Other Question

5n = 2 3/4
multiply 5n by 1/5 = n
multiply 2 3/4 by 1/5 = 11/4 time 1/5 equal 11/20
n=11/20 Find the probability that the name of a month of the year, chosen at random, begins with a consonant.