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Question 1:

A solution contains acid and water in the ratio of $4: 5 .$ If $20 \%$ of the solution is replaced by water, then what will be the ratio of acid and water in the new solution?

Question 2:

In a bag the coins of Rs.1, Rs. 2 and Rs. 5 are in the ratio of $4: 5: 7$ respectively which give total sum of Rs. 343. Find the number of Rs. 1 and Rs. 2 coins together.

Question 3:

A man buys one table and one chair for Rs.500. He sells the table at a loss of $10 \%$ and the chair at a gain of $10 \%$. He still gains Rs. 10 on the whole. The cost price of the chair is :

Question 4:

A alone can complete a work in 25 days and $B$ alone can complete the same work in 15 days. If $C$ is $60 \%$ less efficient than B, then find time taken by A and C together to complete the same work?

Question 5:

A train travels $600 \mathrm{~km}$ in 5 hours and the next $900 \mathrm{~km}$ in 10 hours. What is the average speed of the train?

Question 6:

The sum of two fractions is $\frac{7}{6}$. One of those fractions is $\frac{3}{4}$. The second fraction will be:

Question 7:

Four bells ring at 16, 24, 36, 42 minute intervals. If they ring together at 6.00 a.m., after how long would they next ring together?

Question 8:

In an exam 40 %  students failed in Maths, 30 % failed in English and 10 % failed in both. What is the percentage of students passed in both the subjects?

Question 9:

A sum of money becomes 4 times at simple interest in 10 years. What is the rate of interest?

Question 10:

A grocer has a sale of Rs. 2,000 , Rs. 2,500 , Rs. 3,250 and Rs. 4,250 in 4 months. How much should his sale in the 5 th month be to get an overall average of Rs. 3,500?