SSC GD MATHS QUIZ

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Question 1:

80% and 90% pure acid solutions are mixed to obtain 20 litres of 87% pure acid solution. Find the quantity (in litres) of 80% pure acid solution taken to form the mixture.

Question 2:

A container contains 120 litres of the mixture of milk and water in the ratio 8:4. If 20 litres of milk are added in this mixture, then what is the final ratio of milk and water in the final mixture?

Question 3:

In a mixture, the ratio of milk and water is 5: 3. If 4 liters of water is added to the mixture, the ratio becomes 3: 2. Find the quantity of milk in the mixture.

Question 4:

The ratio of acid and water in solution A is 1: 5 and that in solution B is 2:7. If equal quantities of both the solutions are mixed, then what will be the ratio of acid and water in the new solution?

Question 5:

A trader mixes 15 kg of rice at Rs. 45 per kg with 25 kg of rice of other variety at Rs. 35 per kg and sells the mixture at Rs. 40 per kg. Find his profit or loss percent.

Question 6:

The number of students in a class is 75 , out of which $33 \frac{1}{3} \%$ are boys and the rest are girls. The average score in mathematics of the boys is $66 \frac{2}{3} \%$, more than that of the girls. If the average score of all the students is 66, then the average score of the girls:

Question 7:

In a mixture of 75 litres, the ratio of milk to water is 3: 2. If the ratio is to be 1: 2, how much water should be added ?

Question 8:

Some amount out of Rs 7000 was lent at $6 \%$ p.a. and the remaining at $4 \%$ p.a. If the total simple interest from both the fractions in 5 years was Rs 1600, the sum lent at $6 \%$ p.a. was

Question 9:

An alloy contains $40\%$ silver, $30\%$ copper and $30\%$ nickel. How much silver (in kg) should be mixed in the 25 kg alloy so that silver in the new alloy  becomes $50 \%$  ?

Question 10:

36 litres of a mixture contains milk and water in the ratio 3:1. If 20 litres of this mixture is replaced by 20 litres of milk, then find the ratio of milk to water in the new mixture.