Natural numbers - 9th grade (14y) - math problems

Number of problems found: 211

  • Children and horses
    kone_dzokej There are some children and horses in a field.  Together they have 39 heads and 122 feet. How many children are in the field and how many horses are in the field?
  • Perfect cube
    cube-root Which of the following number is not a perfect cube? a. 64 b. 729 c. 800 d. 1331
  • 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.
  • The sum 16
    eq2_fx The sum of A and B is 36. The difference between A & B is 8. find the larger number of A.
  • Comparing exponents
    powers A) 8 (6²)(8²) b) 16 (6²)(8²) c) (6¹+²) (8²)
  • The sum 13
    prime The sum of the exponents of the prime factors in the prime factorization of 196 is. .. .
  • Three unknown numbers
    eq2_fx The sum of of three numbers is 106. the first number is 10 more then the third. The second number is 2x the third. What are the numbers?
  • The ratio 3
    skola The ratio of male pupils to female pupils in Gymnasium is 7:9. If there are 512 pupils, how many pupils are male?
  • 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?
  • Boys and girls
    skola If the ratio of male & female teachers is 2/5 & it is in proportion of the male & female students, how many are girls if there are 42 boys?
  • Boats 2
    ship Three quarters of the boats in the marina are white 4/7 of the remaining boats are blue, rest are red if there are 9 red boats. How many boats are in the marina?
  • The sum 8
    numbers2 The sum of two numbers is 21. If three times the smaller numbers is two less than twice the larger number, find the two numbers.
  • 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. .. ..
  • 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
  • Sean Junkins
    mince Sean Junkins works at X-Mobile. His pay is easily calculated by using the expression 12h+8c, where h is the number of hours he works and c represents the amount of phones he sells.  Would Sean Junkins make more money if worked 37 hours and sold 3 cell pho
  • Right key
    kluc-skrutky The hostel has 4 rooms. The keys to each room are not numbered. Each of the four guests took one key. What is the probability that everyone took the right key?
  • 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
  • A box
    balls2 A box contains 6 red balls, 5 blue, and 4 white balls. Find the probability of drawing a) red ball b) non-white ball.
  • Committee 2
    workers How many committee consisting of 3 women and 2 men can be formed from a group of 6 woman and 5 men?

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Natural numbers - math problems. Examples for 9th grade.