Elitmus Exam Numerical Ability Time and Work

my elitmus percentile is this
Verbal 60% marks 56.3
Prblm Solv 80% marks 33.8
Quant 80% marks 33.8
next time which module should i focus more .....waiting for ur valuable suggestion

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Elitmus Other Question
There is a cask full of milk, 'E' litres are drawn from the cask, it is then filled with water. this process is repeated.
now the ratio of milk to water in the cask is 16:9. what is the capacity of the cask in liters?
a)E+9
b)9E
c)5E
d)Cannot be determined If q, r > 0, then roots of equation x2 + qx + r = 0 are
A.
Both negative
B.
Both positive
C.
Of positive sign but equal magnitude
D.
Of opposite sign