Printer A and Printer B can each print 1⁄2 page per second. How long will it take both printers working together to print 100 pages?
566 questions match · Mathematics · Preparing for Higher Math
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Three quarts of a bleaching chemical, Minum, contains 5 percent hydrogen peroxide and water. A different type of bleaching chemical, Maxim, which contains 20 percent hydrogen peroxide, will be mixed with the three quarts of Minum. How much of type Maxim should be added to the three quarts of Minum so that the resulting mixture contains 10 percent hydrogen peroxide?
The original price of an item is discounted 22%. A customer buys the item at this discounted price using a $20-off coupon. There is no tax on the item, and this was the only item the customer bought. If the customer paid $1.90 more than half the original price of the item, what was the original price of the item?
A soda can, in the shape of a circular cylinder, is 3/4 full of soda. If the volume of soda in the can is 72π cubic inches and the diameter of the can is 8 inches, then what is the height, in inches, of the can?
5 horses are in a race. Mr.Jain selects two of horses at random and bets on them. The probability that he selected the winning horse is
Santa distributes 2 gifts to every child in the street at the Christmas evening. He mistakenly gives 4 gifts to some children. If he distributed 50 gifts to 21 children. How many children got 4 gifts?
The steamer going upstream would cover the distance between Town A and Town B in 5 hours. The same steamer going downstream would cover the distance between the towns in 3 hours. How long would it take a raft moving at the speed of the current to float from B to A?
If Raj was one-third as old as Rahim 5 years back and Raj is 17 years old now, How old is Rahim now?
My company's funding allows for 5 employees. The proposed offer is $315,000 to distribute evenly to the workers, but they employees are demanding $65,000 each. How much more money does the company need to offer to pay all the workers this amount?
At a company meeting, M men and W women meet in a conference room. If the ratio of men to women is 2:3 at the meeting and the conference room can hold no more than 64 people, then what is the maximum number of women who can be at the meeting?
On a map, the length of the road from Town F to Town G is measured to be 20 inches. On this map, 1/4 inch represents an actual distance of 10 miles. What is the actual distance, in miles, from Town F to Town G along this road?
One day in December 2015, three 2-digit prime numbers A, B and C, were
given to three members of a High School math team: Ashley, Beth, and Caitlin (respectively).
They had this conversation:
Ashley: you two add your numbers, we get precisely today's date!"
Beth: you two add your numbers, we get my birthday this month, which was before today."
Caitlin: you two add your numbers, we get my birthday this month, which is after today."
What number did Caitlin get?
Solution A has 5% salt concentration and remaining water. After heating 50 litres of Solution A at a certain temperature, due to evaporation, the salt concentration increases to 10%. The amount of water remaining in the solution would be
What is the largest integral value of 'k' for which the quadratic equation x2 - 5x + k = 0 will have two real and distinct roots?
You can purchase one soda and two energy bars for 150 cents, or two sodas and three energy bars for 300
cents. If the costs of the items do not change, compute the cost in cents of six sodas and seven bars.
If 6x - y = 24 and y = 3x, what is the value of x?
For a candidate to clear an examination, he/she must score 55% marks. If he/she gets 120 and fails by 78 marks, the total marks for the examination is
If Q, a positive integer, has 5 factors, which of the following must be true about Q?
I. Q is the square of a prime number.
II. Q is the fourth power of a prime number.
III. Q is the product of two prime numbers.
On a test the passing students had an average of 83, while the failing students had an average
of 55. If the overall class average was 76, what percent of the class passed?
Two cars start at the same time from opposite ends of a highway that is 50 miles long. One car is riding at 12 mph and the second car is riding at 13 mph. How long after they begin will they meet?
At Daifu university, 24% of all students are members of both a chess club and a swim team. If 20% of members of the swim team are not members of the chess club, what percentage of all Daifu students are members of the swim team?
A box contains a certain number of balls, marked successively from 1 to n. If there are 45 different ways that two balls can be selected from the box such that the ball with number 3 marked on it is not selected, then what is the value of n?
Two ants are moving from their farms towards each other. Ant A is moving at a speed of 9 cm per hour and ant B is moving at a speed of 6 cm per hour. If the farms are 75 cm away from each other, what will be the distance (in cm) that ant A travels until meeting ant B?
In a class 1/16 of the students study math, 1/10 of the students study bio, 1/8 of the students study english. The total number of students is a 4 digit number. Find the diffrence between maximum number of students and minimum number of students.
Everyone in the family earns money each month. If the total income of a family per month is $9000 and the median income is $3000, how many members are there in the family?