Tamanna is arranging black marbles in groups of 13 and purple marbles in groups of 25. If she has the same number of black and purple marbles, what is the smallest number of marbles of each colour that she could have?

Each marble bag sold by Melissa's Marble Company contains 5 red marbles for every 7 blue marbles. If a bag has 25 red marbles, how many blue marbles does it contain?bluemarbles

Rita is choosing at random from a bag of colored marbles. The probability she will choose a blue marble is 25. What are the odds in favor of her choosing a blue marble?

There are 28 marbles in a blue jar. The blue jar has 4 times as many marbles as a red jar. Let n be the number of marbles in the red jar.

19. The number of of Kristen's marbles 25 more than that of 20% 1 3 was of John's marbles. They had a total of 315 marbles. Kristen gave John some marbles and the ratio of the number of marbles Kristen had left to the ratio of the number of marbles John had left became 29: 34. What was the number of marbles Kristen gave to John?

Emmy has 8 blue marbles and 16 white ones. If she wants to place them in identical groups without any marbles left over, what is the greatest number of groups Emmy can make?