Reason - 8th grade (13y) - math problems

Number of problems found: 489

  • Seven
    post_1 Seven friends agree to send everyone a holiday card. How many postcards were sent?
  • Tricolors
    Flag_of_the_Netherlands.svg From the colors - red, blue, green, black and white, create all possible tricolors.
  • Two-element combinations
    combinatorics Write all two-element combinations from elements a, b, c, d.
  • Probability
    fractions_1 How probable is a randomly selected three-digit number divisible by five or seven?
  • Chess
    chess How many different ways can initiate a game of chess (first pass)?
  • Diofant equation
    eq222_19 250x + 120y = 5640
  • One three
    dice We throw two dice. What is the probability that max one three falls?
  • Subsets
    venn5 How many 19 element's subsets can be made from the 26 element set?
  • Algebrogram
    plus_2 Solve algebrogram: mama+anna=vari How many solutions are?
  • The dice
    hracia-kocka What is the probability of events that if we throw a dice is rolled less than 6?
  • Coins
    mince_1 On coins found was stated that from the year 87 BC. It is right?
  • Summands
    magic Find two summands of the number 42, so that its product is minimized.
  • Three-digit
    seven How many do three-digit natural numbers not have the number 7?
  • Progression
    sequence_geo_10 -12, 60, -300,1500 need next 2 numbers of pattern
  • Christmas Day
    stedryd In leap years was 53 Sundays. On what day of the week fell to Christmas Day?
  • Hexagon = 8 parts
    stef.6.11.99 Divide the regular hexagon into eight equal parts.
  • Rhombus 29
    rhombus3_2 One of the diagonals of a rhombus is equal to a side of the rhombus. Find the angles of the rhombus.
  • Digit sum
    cisla_7 How many are three-digit numbers that have a digit sum of 6?
  • Hockey match
    football_2 The hockey match ended with result 3:1. How many different storylines may have the match?
  • Gold, silver, bronze
    olympics How many ways can we divide gold, silver, bronze medails if there are 6 people competing?

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Reason - math problems. Examples for 8th grade.