PT

Newest questions and responses by PT
  1. Math

    When the digits of a positive integer are written in reverse to form a new positive integer with the same number of digits(e.g., 1234 4321), the new number is 90 less than the original. What is the smallest possible value of the original number?

    asked on March 11, 2019
  2. Math

    Tim and Rich are racing up a 25-foot wall. Tim climbs at 8 inches per minute and Rich climbs at 10 inches per minute. If Tim has a 5 minute head start, by how many SECONDS does the winner beat the other?

    asked on February 19, 2019
  3. Math

    Five dogs (Fido, Ruff, Lassie, Odie, and Snoopy) were playing in the park. Altogether, they had 5 identical Frisbees. In how many ways could the 5 Frisbees be distributed among the dogs when they leave the park to go home?

    asked on February 13, 2019
  4. Math

    A semicircle is inscribed in a rectangle with area 144 square centimeters. In square cm, what is the area of the semicircle?

    asked on February 13, 2019
  5. Math

    Janet can mix a batch of cookie dough in 30 minutes. Miya can mix a batch of cookie dough in 45 minutes. Bella can’t cook, and slows down everybody he works with to half-speed. How many minutes will it take the three of them working together to mix a

    asked on February 13, 2019
  6. Math

    Colin had an average of 96% on his statistics tests going into the last test. He didn’t take the last test and his grade fell to 80%. Assuming each test is worth the same number of points, how many tests were there, including the test Colin didn’t

    asked on February 11, 2019
  7. Math

    After playing the first 25% of his tennis matches this seasons, Colin won 20% of his matches. What percent of his remaining matches must he win to win 50% of his matches ?

    asked on February 11, 2019
  8. Math

    Karen has a total of 17 bills in standard U.S. currency, of at least 3 different denominations (values). She has no $2 bills and no bills worth $100 or more. What is the positive difference between the maximum and minimum number of dollars Karen could

    asked on February 6, 2019
  9. Math

    A cylindrical can has an inner radius of 4 cm and an inner height of 2 cm. A flat, rigid square is entirely enclosed inside the can and the square’s four vertices all touch the interior surfaces or edges of the can. What is the number of square

    asked on February 3, 2019
  10. Math

    One farmer leaves for the market in a tractor towing his produce in a cart at an average rate of 10 m iles per hour. A second farmer leaves from the same farm at the same time, headed for the same market by the same road as the first farmer, on a donkey at

    asked on February 3, 2019
  11. Math

    Jar A has 2 red marbles, 4 green marbles, and 3 blue marbles. Jar B has 4 pink marbles, 6 purple marbles, and 2 white marbles. Marcy randomly choo ses 2 marbles from Jar A, then 2 marbles from Jar B, without replacement in each case. What is the

    asked on February 2, 2019
  12. Math

    For her birthday, Ruthie got 4 math books and some other books, all different. From these, she chooses 2 math books and one other book to take on vacation. There are 30 different sets of books Ruthie could choose. How many books in all did she get for her

    asked on January 22, 2019
  13. Math

    I am thinking of a counting number that is a multiple of 5, but not of 2 or of 3. It has either 2 digits or 3 digits, and no digit is greater than 5. How many numbers could I be thinking of?

    asked on January 22, 2019
  14. Math

    The image of point A(-2, 5) is point A’(1, -2) after a reflection over line k. The equation for line k is in the form y = mx + b. What is the value of m?

    asked on January 22, 2019
  15. Math

    The mean of the first n consecutive positive base-7 numbers is 6. What is the base-10 value of n?

    asked on January 20, 2019
  16. Math

    Rob used all the digits except 0 to write a 9-digit counting number such that no two consecutive digits form a 2-digit prime number. (That is, for the number abc,def,ghi, where letters stand for unique digits, none of the following 2-digit numbers are

    asked on January 16, 2019
  17. Math

    Determine the smallest counting number that satisfies the following conditions: -Divide 7 into this number and you get a remainder of 4. -Divide 8 into this number and you get a remainder of 5. -Divide 9 into this number and you get a remainder of 6.

    asked on January 16, 2019
  18. Math

    George has a 5 pint pitcher and a 3 pint pitcher that are both empty. Each move consists of either pouring water into a pitcher, out of a pitcher, or from one pitcher to the other. What is the least number of moves it would take to get 4 pints of water in

    asked on January 16, 2019
  19. Math

    I have 75 rings (leg bands) to be distributed somehow among 20 pigeons. When all rings are distributed and attached, I will put the pigeons into pigeonholes labeled 0, 1, 2, 3, and so on, with each pigeon going into the pigeonhole labeled with the number

    asked on January 14, 2019
  20. Math

    How many counting numbers less than 100 have an EVEN remainder when divided by 5 and an ODD remainder when divided by 7?

    asked on January 14, 2019
  21. Math

    The four members of a team are comparing scores on the Individual Test. Amy scored 3 points less and Brad scored 6 points less than the average of the team members, while Cara scored 5 points more than the average. Don scored 28 points. What was the score

    asked on January 10, 2019
  22. Math

    Tim has more pennies than nickels, more nickels than dimes, more dimes than quarters, and more quarters than half-dollars. Tim has at least 3 quarters and at least one of each other kind of coin listed. What is the smallest number of cents Tim could have?

    asked on January 10, 2019
  23. Math

    If 1 is added to every prime number less than 100, how many more of the resulting sums will be divisible by 4 than by 3? (If more of the sums are divisible by 3 than by 4, your answer will be negative.)

    asked on December 5, 2018
  24. Math

    Ten apples are distributed among Amy, Ben, Corin, and Dora such that Amy gets at least two, and Corin and Dora get at least one each. If Ben gets at least as many apples as all the others put together, how many ways can the apples be distributed?

    asked on December 4, 2018
  25. Math

    Steven has made 154 Field Goals in 177 attempts. How many Field Goals must he make in a row in order to bring his overall success rate to exactly 90 percent?

    asked on November 26, 2018
  26. Math

    The volume of a rectangular prism is 60 cubic in and the lengths of its edges are all whole numbers. What is the number of inches in the largest possible sum of all of the edges of the prism?

    asked on November 14, 2018
  27. Math

    Simba weighs five pounds more than Sasha. If they both gain two pounds, Simba will weigh twice as much as Sasha. How many pounds does Sasha weigh now?

    asked on October 28, 2018
  28. Ratios

    In an animal shelter, the ratio of cats to dogs is five to two. How many more cats are there than dogs, if the total number of cats and dogs is eighty four?

    asked on March 9, 2018
  29. Probability

    The first card Jon draws from a standard deck is a face card (jack, queen, or king). He keeps this card and draws a second one. If he draws at random, what is the probability that Jon now has a pair of kings? Answer as a reduced fraction.

    asked on March 6, 2018
  30. Probability

    Alice has 2 identical pairs of red shoes and 1 pair of white shoes, where a pair of shoes is one left and one right shoe of the same color.If she draws two shoes at random, what is the probability that she picks a pair? Give your answer as a reduced

    asked on March 5, 2018
  31. Probability

    When rolling 5, 6-sided dice, what is the probability that the 5 numbers appearing on the dice are the same?

    asked on March 5, 2018
  32. Probability

    Triscia had 12 jellybeans in a jar (orange ones, green ones, and purple ones). After she ate all the orange ones (but none of any other color), the probability of taking out a green jellybean by chance was twice as high as it was before she ate any

    asked on March 5, 2018
  33. Probability

    Grace has 2 yellow balloons and 3 red balloons. Her brother, Caleb, is going to pop two of the balloons at random. What is the probability that he pops one of the yellow balloons and one of the red balloons?

    asked on March 5, 2018
  34. Probability

    Keisha and Kelly have an astronomy club devoted to observing the moon. If the moon is visible 28 out of 29 days and the girls can make it outside 14 days per 29 days, what is the probability they will go out on a night when the moon is not visible?

    asked on March 5, 2018
  35. Probability

    There are 6 methods of travel (walk,run,unicycle,bicycle,scooter,car). For three days, Max decides that he wants to randomly select his method of travel taking him to work. What is the probability that exactly one of the three days, Max walks to work?

    asked on March 5, 2018
  36. Math

    Let f(x) = 3x + 2 Find f(a) and f(2a). I'm confused, can someone help me?

    asked on August 28, 2016
  37. Economics

    I just don't understand why is the index expressed as 100 for the base year

    asked on February 1, 2008
  1. Math

    They say it is 36Pi sq.cm

    posted on February 13, 2019
  2. Math

    I get 32 as answer, where as the given answer is 34.

    posted on February 3, 2019
  3. Math

    Thanks Ms Pi

    posted on February 3, 2019
  4. Math

    Thank you sir !!

    posted on January 22, 2019
  5. Math

    figured out 501

    posted on January 16, 2019
  6. Math

    figured it out 6 moves

    posted on January 16, 2019
  7. Math

    146+140+115+75+50 = 196cents

    posted on January 10, 2019
  8. Math

    Thanks again Scott.

    posted on December 5, 2018
  9. Math

    Thanks R_scott

    posted on December 5, 2018
  10. Math

    Thanks Steve!

    posted on November 27, 2018
  11. Math

    Thanks Damon, they say it is 248 inches total, not sure how they arrive.

    posted on November 14, 2018
  12. Math

    Thanks R_scott

    posted on October 29, 2018
  13. Ratios

    Thanks

    posted on March 9, 2018
  14. Probability

    Thanks Steve!!

    posted on March 6, 2018
  15. Probability

    Thanks Reiny!

    posted on March 5, 2018
  16. Probability

    Thanks again Scott!

    posted on March 5, 2018
  17. Probability

    Thanks a lot Scott!!

    posted on March 5, 2018
  18. Math

    A bus set off a bus-stop and travelled towards the factory at a constant speed. 20 minutes later, a van set off the same bus-stop and travelled towards the factory along the same route at a constant speed. The van caught up with the bus 40 minutes after

    posted on July 24, 2016