navodaya Exam Numerical Ability

In a school ,3/7 of the students are girls and 1/4 of the boys are below six years of age .5/6 of the girls are also below six years of age if the number of students of age six or more years is 300, the total number of student in the school is .

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navodaya Other Question

In a mixture of 120 litres ,the ratio of acid and water is 2:1. If the ratio of acid and water is to be 2:3 , then the amount of water (in lit) to be added to the mixture is A LOAN of Rs. 127500 is to be paid back in two equal half-yearly instalments.If interest is compounded half-yearly at 8% per annum,then each instalments is of