Reason + multiplication - math problems

Number of problems found: 163

  • Round table
    Find the number of ways in which 8 people can be seated at a round table, such that 2 of them always sit together.
  • Balls in row
    Calculate the number of ways of placing 4 black balls, 4 turquoise balls and 5 gold balls in a row.
  • The three
    The three boys Adam, Boris and Cyril are to be taken on a two-seater ski lift. How many different removal options are there? What would it be like if four boys or five were to be taken away?
  • Boys and girls 8
    In a class of 35 boys and girls that has a ratio of 2:5, 5 boys are absent and 5 boys are present. How many students are present?
  • Three towns and roads
    If there are 3 roads from town A to town B And 4 roads from town B to town C, in how many ways can one go from town A to town C and back to town A, through town B, without passing through the same road twice?
  • Hockey Championships
    At the 2021 World Hockey Championships, there are eight teams in Group A, each of which plays seven matches. There are 4 points for each team to gain points (3-2-1-0), but it is always paired with the opponent's points ( 0-1-2-3). How many points are ther
  • A married
    A married couple planned to have 3 children. i. List the possible combinations of the sexes of 3 children. Use B for boy and G for girl. ii. Calculate the probability that all three children would be of the same gender
  • Three wagons
    I have 6 different people (A, B, C, D, E, F), which I have to place into 3 wagons, if it depends on who will board. How many options are there?
  • A bag
    A bag contains 9 blue marbles and 1 green marble. What is the probability of drawing a blue marble followed by a green marble, without replacing the first marble before drawing the second marble.
  • Two-digit number
    In a two-digit number, the number of tens is three greater than the number of units. If we multiply the original number by a number written in the same digits but in reverse order, we get product 3 478. Find the original number.
  • We roll
    We roll two dice A. - what is the probability that the sum of the falling numbers is at most 4 B. - is at least 10 C. - is divisible by 5?
  • Two dice
    We roll two dice. What is the probability that the sum of the falling numbers is greater than 3?
  • The difference 2
    The difference between the two numbers is 25. The smaller number is 1/6th of the larger number. What is the value of the smaller number?
  • Exchange € 100
    Find out how many ways you can exchange € 100 if you have an unlimited number of 50, 20, 10 and 5 euro banknotes. Use a method other than listing all options systematically.
  • Karolína
    Karolína chose 5 bodies from the kit - white, blue and gray cubes, a blue cylinder and a white triangular prism. How many different roof towers can be built one by one if all the blue bodies (cube and cylinder) are not placed on top of each other?
  • A license
    A license plate has
3 letters followed by 4 numbers. Repeats are not allowed for the letters, but they are for the numbers. If they are issued at random, what is the probability that the 3 letters are in alphabetical order and the 3 numbers are consecutiv
  • Pagans
    Jano and Michael ate pagans. Jano ate three more than Michael. The product of their counts (numbers) is 180. How many pagans did each of them eat?
  • Number 4
    Kamila wrote all natural numbers from 1 to 400 inclusive. How many times did she write the number 4?
  • Two-element combinations
    Write all two-element combinations from elements a, b, c, d.
  • Big numbers
    How many natural numbers less than 10 to the sixth can be written in numbers: a) 9.8.7 b) 9.8.0

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Reason - math problems. Multiplication Problems.