There are 5 tasks and 5 persons. Task-1 cannot be assigned to person-1 or person-2. Task-2 must be assigned to person-3 or person-4. Each person is to be assigned one task. In how many ways can the assignment be done?

An automobile owner reduced his monthly petrol consumption when the prices went up. The price-consumption relationship is as follows:

Price (in Rs. per litre) 40 50 60 75 Monthly consumption (in litres) 60 48 40 32

If the price goes up to Rs. 80 per litre, his expected consumption (in litres) will be

A student has to opt for 2 subjects out of 5 subjects for a course, namely, Commerce, Economics, Statistics, Mathematics I, and Mathematics II. Mathematics II can be offered only if Mathematics I is also opted. The number of different combinations of two subjects that can be opted is:

In a box of marbles, there are 3 fewer white marbles than red ones and 5 more white marbles than green ones. If there are 10 white marbles, how many marbles are in the box?

In a parking area, the total number of wheels of all the cars (four-wheelers) and scooters/motorbikes (two-wheelers) is 100 more than twice the number of parked vehicles. The number of cars parked is:

The monthly incomes of Peter and Paul are in the ratio of $4:3$. Their expenses are in the ratio of $3:2$. If both save Rs. 6000 at the end of the month, their respective monthly incomes are:

Two pipes A and B can independently fill a tank completely in 20 and 30 minutes respectively. If both the pipes are opened simultaneously, how much time will they take to fill the tank completely?

Two equal glasses of the same type are respectively $\frac{1}{3}$ and $\frac{1}{4}$ full of milk. They are then filled up with water and the contents are mixed in a pot. What is the ratio of milk to water in the pot?

In a town, 45% of the population read magazine A, 55% read magazine B, 40% read magazine C, 30% read magazines A and B, 15% read magazines B and C, 25% read magazines A and C, and 10% read all three magazines. What percentage do not read any magazine?

If ABC × DEED = ABCABC; where A, B, C, D and E are different digits, what are the values of D and E?

Each of A, B, C, and D has Rs. 100. A pays Rs. 20 to B, who pays Rs. 10 to C, who gets Rs. 30 from D. In this context, which one of the following statements is not correct?

A cow costs more than 4 goats but less than 5 goats. If a goat costs between Rs. 600 and Rs. 800, what is the most valid conclusion?

In a competitive exam, 60% of candidates are men, and 40% are women. 70% of men and 75% of women clear the qualifying test. In the final test, 80% of men and 70% of women succeed. Which statement is correct?

A father is nine times as old as his son and the mother is eight times as old as the son. The sum of the father’s and the mother’s age is 51 years. What is the age of the son?

A selection is to be made for one post of Principal and two posts of Vice-Principal. Amongst the six candidates called for the interview, only two are eligible for the post of Principal while they all are eligible for the post of Vice-Principal. The number of possible combinations of selectees is:

A person ordered 5 pairs of black socks and some pairs of brown socks. The price of a black pair was thrice that of a brown pair. While preparing the bill, the bill clerk interchanged the number of black and brown pairs by mistake which increased the bill by 100%. What was the number of pairs of brown socks in the original order?

In a test, a candidate attempted only 8 questions and secured 50% marks in each of the questions. If he obtained a total of 40% in the test and all questions in the test carried equal marks, how many questions were there in the test?

In a society, friends of the same sex hug while friends of opposite sexes shake hands. A group of friends met at a party, resulting in 24 handshakes. What is the possible number of hugs?

In a 500-meter race, B starts 45 meters ahead of A, but A wins the race while B is still 35 meters behind. What is the ratio of the speed of A to B assuming that both start at the same time?

Two cities, A and B, are 360 km apart. A car goes from A to B at a speed of $40$ km/hr and returns to A at $60$ km/hr. What is the car's average speed?