CDS || Arithmetic || Mini Mock

A stock of food grains is enough for 240 men for 48 days. How long will the same stock last for 160 men?

Two taps X and Y are fixed to a water tank. If only X is opened, it drains out the full tank of water in 20 minutes. If both X and Y are opened, then they drain out the full tank of water in 15 minutes. If only Y is opened, how long does it take to drain out the full tank of water

If the ratio of the work done by (x + 2) workers in (x – 3) days to the work done by (x + 4) workers in (x – 2) days is 3 : 4, then what is the value of x?

Radha and Rani are sisters. Five years back the age of Radha was three times that of Rani, but one year back the age of Radha was two times that of Rani. What is the age difference between them?

The rate of interest on two different schemes is the same and it is 20%. But in one of the schemes, the interest is compounded half yearly and in the other the interest is compounded annually. Equal amounts are invested in the schemes. If the difference of the returns after 2 years is Rs. 482, then what is the principal amount in each scheme?

The monthly incomes of A and B are in the ratio 4 : 3. Each saves Rs. 600. If their expenditures are in the ratio 3 : 2, then what is the monthly incomes of A?

The train fare and bus fare between two stations is in the ratio 3 : 4. If the train fare increases by 20% and bus fare increases by 30%, then what is the ratio between revised train fare and revised bus fare?

A person sells two items each at Rs. 990, one at a profit of 10% and another at a loss of 10% What is the combined percentage of profit or loss for the two items?

Simplify :

A person deposited a certain money in bank. Bank offers him 10% pa compounded annually. If he deposits Rs. 3500 at the end of first year and withdraws Rs. 5000 at the end of second year. Finally, at the end of third year the amount he gets is Rs. 18700. Then find his initial investment.

In a mile race, Arun runs at a speed of 10 km/hr. he gives a start of 200 metres to Chintu and still defeats him by 24 seconds. Find the speed of chintu.

The ratio of efficiency of B and A is 3:2 and the efficiency of A is twice the efficiency of C. If A and B start a project together and finish it in 12 days, total how many days will they take to finish the project if C helps them from the 4th day until the project is finished?

If a : b = 3 : 4 and b : c = 3 : 8, then 2a : 3b : 7c is equal to:

If  and  then the value of  ?

Two numbers are in the ratio 5 : 7. If the first number is 20, then the second number will be:

The income of A is 60% less than that of B, and the expenditure of A is equal to 60% of B’s expenditure. If A’s income is equal to 70% of B’s expenditure, then what is the ratio of the savings of A and B?

Rajesh bought two fans for Rs. 2784. One sell at 25% loss and another sell at 25% profit. If selling price are same of both then find its cost price.

The cost price of 15 articles is same as the selling price of x articles then find the value of x while profit percentage is 25%.

What is the average of first 12 multiples of 5?