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

#### Number of problems found: 473

• Seven Seven friends agree to send everyone a holiday card. How many postcards were sent?
• Coins On coins found was stated that from the year 87 BC. It is right?
• One three We throw two dice. What is the probability that max one three falls?
• Pair They have together 39 years - he has 2 times as she was when he was equal as she has today ....
• Two integers Two integers, a and b, have a product of 36. What is the least possible sum of a and b?
• Probability How probable is a randomly selected three-digit number divisible by five or seven?
• Divisibility Write all the integers x divisible by seven and eight at the same time for which the following applies: 100
• Brackets Place one pair of brackets in expression 20-16 + 10 - 4 - 2 so that the result will be 0.
• Chess How many different ways can initiate a game of chess (first pass)?
• The dice What is the probability of events that if we throw a dice is rolled less than 6?
• Two-element combinations Write all two-element combinations from elements a, b, c, d.
• Tricolors From the colors - red, blue, green, black and white, create all possible tricolors.
• Probably member Look at the series 2,6,25,96,285, ? What number should come next?
• Years Susan is 3 years and as she will be old as Teodor now him will be 11. How old is Teodor today?
• Marriage sttus In our city, there are 3/5 of the women married to 2/3 of the men. Find what part of the population is free.
• Combinations of sweaters I have 4 sweaters two are white, 1 red and 1 green. How many ways can this done?
• Three ints The sum of three consecutive integers is 2016. What numbers are they?
• Two ages Gabrielle is 9 years younger than Mikhail. The sum of their ages is 87. What is Mikhail's age?
• Family Mom is 42 years old and her daughters 13 and 19. After how many years will mother as old as her daughter together?
• Series Andrew wrote this series of numbers: 1,3,7,15, .... n. Which number in the series does not belong? ?

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