Natural numbers + reason - math problems

Number of problems found: 235

  • Dividing
    kosiky When dividing the tangerines into packages of 8 or 10, one always remained. How many were there if there were more than 250 and less than 300?
  • White balls
    balls2 I have 3 white balls and 5 red balls in my pocket. How many least balls do I have to remove from the bag to make sure that the pulled out ball is definitely red?
  • Lcm = 22 + gcd
    prime The least common multiple of two numbers is 22 more than their greatest common divisor. Find these numbers.
  • Phone number
    pin_keyboard Ivan's phone number ends with a four-digit number: When we subtract the first from the fourth digit of this four-digit number, we get the same number as when we subtract the second from the third digit. If we write the four-digit number from the back and
  • Four-digit number
    cislo For a four-digit number abcd, ab: bc = 1: 3 and bc: cd = 2: 1 (ab, bc and cd are two-digit numbers from digits a, b, c, d). Find this number(s).
  • Two numbers
    eq1 One number is by 79 larger than the other. If we divide the larger number by the smaller one, we get the ratio 5 and the remainder 11. Determine both numbers.
  • Athletics team
    olympics All athletes in the athletics team from Ostrava can start in four, five, six and seven stages, and no one will be present. How many average athletes are in one athletic group if there are a total of twelve groups in the section? Consider the smallest numb
  • Boys and girls 8
    boy 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?
  • Special sequence
    seq What if            2×9=1            3×9=2            4×9=3            5×9=4            6×9=5            7×9=6            8×9=7            9×9=8           10×9=9    then 1×9=??? answer with solutions. .. ..
  • Five number code
    pin_keyboard I have a 5 digit code on the bag that I forgot. All I remember is that it was a symmetric number and the sum of its digits was 22. Write all the numbers that can be a code. .
  • Petra's test
    test The answer will be given 8 marks, and the wrong answer will be deducted 3 marks. The total number of marks obtained by the school is 36. If Petra answered six questions correctly,   how many questions were answered incorrectly by the student from the scho
  • Fruit equation
    jablon Find how many peaches could be bought instead of buying one melon, one pear, one apple and two plums if we know that: • Melon and plum cost the same as three apples • if we subtract the price of a pear from the price of peach, we get the price of plum • T
  • Three towns and roads
    map 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
    hokej 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
  • Three wagons
    wagon 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?
  • Row for lunch
    skola There are less than 66 people in a row for lunch. In front of Eva, there are 28 students. Behind Martin, there are 30 people. Between Eva and Martin, there are 17 people. How many students stand behind Eva if Martin stands in front of Eva?
  • A bag
    balls2 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
    numbers 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
    dices2 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?
  • We bought
    cukriky We bought 140 fruit, 196 chocolate and 84 caramel lollipops. How many of the same packages can we prepare from them?

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Natural numbers - math problems. Reason - math problems.