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maths ( mental ability)
P can do a piece of work in 9 days. Q is 50% more efficient than P. The number of days it takes Q to do the same piece of work is?
a man loses 12.5% of his money & after spending 70% of the remainder , he was left with Rs 210/- . the money he had at the beginning is?
what is light year & 1 light year=to?
n+3=12 transposing (-3)to r.h.s n=12-3 n=9