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An empty fuel tank of a car was filled with A type petrol. When the was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank?

What would be the compound interest obtained on an amount of Rs.20,000 at the rate of 15 p.c.pa. after 4 years?

A shopkeeper purchased 25 items at 36 Rs per item. He spent 100 Rs on transportation of these items. What should be the selling price of each item if he wants to make 22.5% as profit?

In how many years will a sum of Rs 800 at 10% per annum compounded semi-annually becomes Rs 926.10

I bought 5 pens, 7 pencils and 4 erasers. Rajan bought 6 pens, 8 erasers and 14 pencils for an amount which was half more than what I had paid. What percent of the total amount paid by me was paid for the pens?

Sridhar Krishnan bought 100 shares each of 4 different companies. The purchase prices of theshares are Rs.20, Rs.19.50, Rs.27.50 and Rs.26.00 per share on a certain date. In due course oftime he sold off all the shares of all the 4 companies, but the transactions took place on differentdates. The sale transactions fetched him Rs.12.3, Rs.37.4, Rs.28.6 and Rs.21.7 per share, but it isnot known which company's shares were sold when. What is his net profit or loss ?

When a number is added to another number the total becomes 33 1/3 percent of the second.  What ratio between the first and the second?

The probability that a card drawn from a pack of 52 cards will be a diamond  or a  king, is

The circumference of the front wheel of a cart is 40 ft long and that of the back wheel is 48 ft long. What is the distance travelled by the cart, when the front wheel has done five more revolutions than the rear wheel?

M, N, O and P divided `44352 among themselves. M took 3/8 th of the money, N took 1/6 of the remaining amount and rest was divided among O and P is the ratio of 3 : 4 respectively. How much did O get as his share?

Pens at 20 Rs each and books at 40 Rs each were purchased. In all these were 6, at a total cost of Rs.180. If the number of Pens and books were interchanged, how much less would have been spent ?

In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

N number of persons decided to raise Rs. 3 lakhs by equal contributions from each. Had they contributed Rs. 50 each extra, the contribution would have been Rs. 3.25 lakhs. How many persons are there ?

A very small ball lies at the point (3, 2) in the X – Y plane. The ball is now shifted by 5 units towards the negative Y-axis. If Y-axis were a mirror, then at what point will the image of this ball, lie?

Dinesh speaks truth in 3/4 cases and Abhishek lies in 1/5 cases. What is the percentage of cases in which both Dinesh and Abhishek contradict each other in stating a fact?

A person spends 2,325 Rs on his monthly expenditure and the rest 85% of his monthly salary in invested in shares. What is the annual income from salary?

During one year the population o f a town increased by 20% and during the next year it diminished by 20%. Then the population now is

The probability that a man will be alive for 25 years is 3/5 and the probability that his wife will be alive for 25 years is 2/3. Find the probability that only the man will be alive for 25 years.

In an election, 30% of the voters voted for candidate A whereas 60% of the remaining voted for candidate B. The remaining voters did not vote. If the difference between those who voted for candidate A and those who did not vote was 1200, how many individuals were eligible for casting vote in that election?

If three balls are randomly drawn from the bag, then what is the probability that al least 1 is red.

If ( p - q) 2 = ( x – y ) 2, then x =

If a = 0.1039, then the value of + 3a is:

Some articles were bought at 6 for Rs. 5 and sold at 5 for Rs. 6. Gain percent is:

What is the probability of getting a sum 9 from two throws of a dice?

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The H.C.F of 0.54, 1.8 and 7.2 is:

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By selling an umbrella for Rs.300, a shopkeeper gains 20%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is:

Ratio of the earnings of A and B is 4 : 7. If the change of A increase by 50% and those of B decrease by 25%, the new ratio of their earnings becomes 8 : 7. What are A’s earnings?

The ratio of the number of boys and girls in a college is 7:8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?